as defined herein , the sun protection factor ( spf ) is expressed mathematically by the ratio of the irradiation time required to attain the erythema - forming threshold with the uv screening agent to the time required to attain the erythema - forming threshold in the absence of uv screening agent . measurement of the levels of sunscreen protection or spf is performed according to the test set forth in the federal register vol . 46 , no . 17 , of tuesday jan . 27 , 1981 . as defined herein , stability is tested by placing the composition in a controlled environment chamber for 8 weeks at 25 ° c . in this test , the physical condition of the sample is inspected as it is placed in the chamber . the sample is then inspected again at 24 hours , 3 days , 1 week , 2 weeks , 4 weeks and 8 weeks . at each inspection , the sample is examined for abnormalities in the composition such as bending or leaning if the composition is in stick form , phase separation , melting , or syneresis . as used herein syneresis is the appearance of droplets on the surface of a composition that are visible to the naked eye . the stability is further tested by repeating the 8 week test at 4 ° c ., 37 ° c ., 45 ° c ., 50 ° c . and under freeze - thaw conditions . a composition is considered to lack stability if in any of these tests an abnormality that impedes functioning of the composition is observed . the skilled artisan will readily recognize an abnormality that impedes functioning of a composition based on the intended application . structured liquid fatty phases in cosmetic or dermatological products are known in the art . as used herein , “ structured ” means gelled and / or rigidified . structured liquid fatty phases may be found in solid compositions such as deodorants , balms , lip compositions , concealer products and cast foundations . the compositions of the invention , in one embodiment , may comprise at least one liquid fatty phase . as used herein , “ liquid fatty phase ” means a fatty phase which is liquid at room temperature ( 25 ° c .) and at atmospheric pressure ( 760 mmhg ) and which is composed of at least one fatty substance , such as an oil , which is liquid at room temperature and not soluble in water . if the at least one liquid fatty phase comprises two or more fatty substances , they should be mutually compatible . structured liquid fatty phases may make it possible to control the exudation of the liquid fatty phase from the solid compositions of which they are components including exudation in a wet or hot atmosphere or environment . structuring of the liquid fatty phase may also limit bleeding of this phase outside of the intended area of application and especially into wrinkles and fine lines after it has been deposited , for example , on keratinous material . as used herein , “ keratinous material ” is meant to comprise hair , lips , skin , scalp and superficial body growths such as eyelashes , eyebrows and nails . the invention applies not only to make - up products for at least one keratinous material such as lip compositions , lip pencils , foundations including foundations which may be cast in the form of a stick or a dish , concealer products , temporary tattoo products , eyeliners , mascara bars but also to body hygiene products such as deodorant sticks , and to care products and products for treating at least one keratinous material such as sunscreen and after - sun products which may be in stick form . the present invention may be in the form of mascara product including mascara bars , an eyeliner product , a foundation product , a lipstick product , a blush for cheeks or eyelids , a deodorant product , a make - up product for the body , a make - up - removing product , an eyeshadow product , a face powder product , a concealer product , a treating shampoo product , a hair conditioning product , a sun screen , colorant for the skin or hair , or skin care formula such as , for example , anti - pimple or shaving cut formulas . as defined herein , a deodorant product is a body hygiene product and does not relate to care , make - up , or treatment of keratin materials , including keratin fibers , skin , or lips . for example , the composition of the present invention may be in a form chosen from a paste , a solid , a gel , and a cream . it may be an emulsion , such as an oil - in - water or water - in - oil emulsion , a multiple emulsion , such as an oil - in - water - in - oil emulsion or a water - in - oil - in - water emulsion , or a solid , rigid or supple gel , including anhydrous gels . in one embodiment , the composition of the invention is anhydrous . the composition of the invention may , for example , comprise an external or continuous fatty phase . in another embodiment , the composition of the invention is transparent or clear , including for example , a composition without pigments . the composition can also be in a form chosen from a translucent anhydrous gel and a transparent anhydrous gel . the composition can also be a molded composition or cast as a stick or a dish . the composition in one embodiment is a solid such as a molded stick or a poured stick . in one embodiment , the at least one structuring polymer in the composition of the invention is a solid that is not deformable at room temperature ( 25 ° c .) and atmospheric pressure ( 760 mmhg ). in a further embodiment , the at least one structuring polymer is capable of structuring the composition without opacifying it . as defined above , the at least one structuring polymer of the present invention comprises a polymer skeleton comprising at least one hydrocarbon - based repeating unit comprising at least one hetero atom . in one embodiment , the at least one structuring polymer further comprises at least one terminal fatty chain chosen from alkyl and alkenyl chains , such as of at least 4 atoms , and further such as comprising 8 to 120 carbon atoms , bonded to the polymer skeleton via at least one linking group . the terminal fatty chain may , for example , be functionalized . the at least one structuring polymer may also further comprise at least one pendant fatty chain chosen from alkyl and alkenyl chains , such as of at least 4 atoms , and further such as comprising 8 to 120 carbon atoms , bonded to any carbon or hetero atom of the polymer skeleton via at least one linking group . the pendant fatty chain may , for example , be functionalized . the at least one structuring polymer may comprise both at least one pendant fatty chain and at least one terminal fatty chain as defined above , and one or both types of chains can be functionalized . in one embodiment , the structuring polymer comprises at least two hydrocarbon - based repeating units . as a further example , the structuring polymer comprises at least three hydrocarbon - based repeating units and as an even further example , the at least three repeating units are identical . as used herein , “ functionalized ” means comprising at least one functional group . non - limiting examples of functional groups include hydroxyl groups , ether groups , oxyalkylene groups , polyoxyalkylene groups , carboxylic acid groups , amine groups , amide groups , halogen containing groups , including fluoro and perfluoro groups , halogen atoms , ester groups , siloxane groups and polysiloxane groups . for purposes of the invention , the expression “ functionalized chain ” means , for example , an alkyl chain comprising at least one functional ( reactive ) group chosen , for example , from those recited above . for example , in one embodiment , the hydrogen atoms of at least one alkyl chain may be substituted at least partially with fluorine atoms . according to the invention , these chains may be linked directly to the polymer skeleton or via an ester function or a perfluoro group . for the purposes of the invention , the term “ polymer ” means a compound containing at least 2 repeating units , such as , for example , a compound containing at least 3 repeating units , which may be identical . as used herein , the expression “ hydrocarbon - based repeating unit ” includes a repeating unit comprising from 2 to 80 carbon atoms , such as , for example , from 2 to 60 carbon atoms . the at least one hydrocarbon - based repeating unit may also comprise oxygen atoms . the hydrocarbon - based repeating unit may be chosen from saturated and unsaturated hydrocarbon - based repeating units which in turn may be chosen from linear hydrocarbon - based repeating units , branched hydrocarbon - based repeating units and cyclic hydrocarbon - based repeating units . the at least one hydrocarbon - based repeating unit may comprise , for example , at least one hetero atom that is part of the polymer skeleton , i . e ., not pendant . the at least one hetero atom may be chosen , for example , from nitrogen , sulphur , and phosphorus . for example , the at least one hetero atom may be a nitrogen atom , such as a non - pendant nitrogen atom . in another embodiment , the at least one hydrocarbon - based repeating unit may comprise at least one hetero atom with the proviso that the at least one hetero atom is not nitrogen . in another embodiment , the at least one hetero atom is combined with at least one atom chosen from oxygen and carbon to form a hetero atom group . in one embodiment , the hetero atom group comprises a carbonyl group . the at least one repeating unit comprising at least one hetero atom may be chosen , for example , from amide groups , carbamate groups , and urea groups . in one embodiment , the at least one repeating unit comprises amide groups forming a polyamide skeleton . in another embodiment , the at least one repeating unit comprises carbamate groups and / or urea groups forming a polyurethane skeleton , a polyurea skeleton and / or a polyurethane - polyurea skeleton . the pendant chains , for example , can be linked directly to at least one of the hetero atoms of the polymer skeleton . in yet another embodiment , the at least one hydrocarbon - based repeating unit may comprise at least one hetero atom group with the proviso that the at least one hetero atom group is not an amide group . in one embodiment , the polymer skeleton comprises at least one repeating unit chosen from silicone units and oxyalkylene units , the at least one repeating unit being between the hydrocarbon - based repeating units . in one embodiment , the compositions of the invention comprise at least one structuring polymer with nitrogen atoms , such as amide , urea , or carbamate units , such as amide units , and at least one polar oil . in one embodiment , in the at least one structuring polymer , the percentage of the total number of fatty chains ranges from 40 % to 98 % relative to the total number of repeating units and fatty chains , and as a further example , from 50 % to 95 %. in a further embodiment wherein the polymer skeleton is a polyamide skeleton , in the at least one structuring polymer , the percentage of the total number of fatty chains ranges from 40 % to 98 % relative to the total number of all amide units and fatty chains , and as a further example , from 50 % to 95 %. in a further embodiment , the nature and proportion of the at least one hydrocarbon - based repeating unit comprising at least one hetero atom depends on the nature of a liquid fatty phase of the composition and is , for example , similar to the nature of the fatty phase . for example , not to be limited as to theory , the more polar the hydrocarbon - based repeating units containing a hetero atom , and in high proportion , which corresponds to the presence of several hetero atoms , the greater the affinity of the at least one structuring polymer to polar oils . conversely , the more non - polar , or even apolar , and lesser in proportion the hydrocarbon - based repeating units containing a hetero atom , the greater the affinity of the polymer for apolar oils . in another embodiment , the invention is drawn to a structured composition containing at least one liquid fatty phase structured with at least one structuring polymer , wherein the at least one structuring polymer is a polyamide comprising a polymer skeleton comprising at least one amide repeating unit and optionally at least one pendant fatty chain and / or at least one terminal chain that are optionally functionalized and comprise from 8 to 120 carbon atoms , bonded to at least one of the amide repeating units via at least one linking group . the liquid fatty phase further contains at least one organogellator for gelling the liquid fatty phase . the at least one liquid fatty phase , the at least one structuring polyamide and the at least one organogellator together form a physiologically acceptable medium . when the structuring polymer has amide repeating units , the pendant fatty chains may be linked to at least one of the nitrogen atoms in the amide repeating units . the structuring polymer , for example the polyamide polymer , may have a weight - average molecular mass of less than 100 , 000 , such as less than 50 , 000 . in another embodiment , the weight - average molecular mass may range from 1000 to 30 , 000 , such as from 2000 to 20 , 000 , further such as from 2000 to 10 , 000 . as discussed , the at least one structuring polymer may , for example , be chosen from polyamide polymers . a polyamide polymer may comprise , for example , a polymer skeleton which comprises at least one amide repeating unit , i . e ., a polyamide skeleton . in one embodiment , the polyamide skeleton may further comprise at least one terminal fatty chain chosen from alkyl chains , for example , alkyl chains comprising at least four carbon atoms , and alkenyl chains , for example , alkenyl chains comprising at least four carbon atoms , bonded to the at least one polyamide skeleton via at least one linking group , and / or at least one pendant fatty chain chosen from alkyl chains , for example , alkyl chains comprising at least four carbon atoms , and alkenyl chains , for example , alkenyl chains comprising at least four carbon atoms , bonded to the at least one polyamide skeleton via at least one linking group . in one embodiment , the polyamide skeleton may comprise at least one terminal fatty chain chosen from fatty chains comprising 8 to 120 carbon atoms , such as , for example , 12 to 68 carbon atoms , bonded to the at least one polyamide skeleton via at least one linking group and / or at least one pendant fatty chain chosen from fatty chains comprising 8 to 120 carbon atoms , such as , for example , 12 to 68 carbon atoms , bonded to the at least one polyamide skeleton via at least one linking group , such as bonded to any carbon or nitrogen of the polyamide skeleton via the at least one linking group . in one embodiment , the at least one linking group is chosen from single bonds and urea , urethane , thiourea , thiourethane , thioether , thioester , ester , ether and amine groups . for example , the at least one linking group is chosen from ureas , esters , and amines , and as a further example , is chosen from esters and amines . the bond is , for example , an ester bond . in one embodiment , these polymers comprise a fatty chain at each end of the polymer skeleton , such as the polyamide skeleton . in one embodiment , due to the presence of at least one chain , the polyamide polymers may be readily soluble in oils ( i . e ., water - immiscible liquid compounds ) and thus may give macroscopically homogeneous compositions even with a high content ( at least 25 %) of the polyamide polymers , unlike certain polymers of the prior art that do not contain such alkyl or alkenyl chains at the end of the polyamide skeleton . as defined herein , a composition is soluble if it has a solubility of greater than 0 . 01 g per 100 ml of solution at 25 ° c . in a further embodiment , the polyamide polymers can be chosen from polymers resulting from at least one polycondensation reaction between at least one acid chosen from dicarboxylic acids comprising at least 32 carbon atoms , such as 32 to 44 carbon atoms , and at least one amine chosen from diamines comprising at least 2 carbon atoms , such as from 2 to 36 carbon atoms , and triamines comprising at least 2 carbon atoms , such as from 2 to 36 carbon atoms . the dicarboxylic acids can , for example , be chosen from dimers of at least one fatty acid comprising at least 16 carbon atoms , such as oleic acid , linoleic acid and linolenic acid . the at least one amine can , for example , be chosen from diamines , such as ethylenediamine , hexylenediamine , hexamethylenediamine , phenylenediamine and triamines , such as ethylenetriamine . the polyamide polymers may also be chosen from polymers comprising at least one terminal carboxylic acid group . the at least one terminal carboxylic acid group can , for example , be esterified with at least one alcohol chosen from monoalcohols comprising at least 4 carbon atoms . for example , the at least one alcohol can be chosen from monoalcohols comprising from 10 to 36 carbon atoms . in a further embodiment , the monoalcohols can comprise from 12 to 24 carbon atoms , such as from 16 to 24 carbon atoms , and for example 18 carbon atoms . in one embodiment , the at least one polyamide polymer may be chosen from those described in u . s . pat . no . 5 , 783 , 657 , the disclosure of which is incorporated herein by reference , which are polymers of formula ( i ): n is an integer which represents the number of amide units such that the number of ester groups present in said at least one polyamide polymer ranges from 10 % to 50 % of the total number of all said ester groups and all said amide groups comprised in said at least one polyamide polymer ; r 1 , which are identical or different , are each chosen from alkyl groups comprising at least 4 carbon atoms and alkenyl groups comprising at least 4 carbon atoms . in one embodiment , the alkyl group comprises from 4 to 24 carbon atoms and the alkenyl group comprises from 4 to 24 carbon atoms ; r 2 , which are identical or different , are each chosen from c 4 to c 42 hydrocarbon - based groups with the proviso that at least 50 % of all r 2 are chosen from c 30 to c 42 hydrocarbon - based groups ; r 3 , which are identical or different , are each chosen from organic groups comprising atoms chosen from carbon atoms , hydrogen atoms , oxygen atoms and nitrogen atoms with the proviso that r 3 comprises at least 2 carbon atoms ; and r 4 , which are identical or different , are each chosen from hydrogen atoms , c 1 to c 10 alkyl groups and a direct bond to at least one group chosen from r 3 and another r 4 such that when said at least one group is chosen from another r 4 , the nitrogen atom to which both r 3 and r 4 are bonded forms part of a heterocyclic structure defined in part by r 4 — n — r 3 , with the proviso that at least 50 % of all r 4 are chosen from hydrogen atoms . in one embodiment , the at least one terminal fatty chain of formula ( i ) is linked to the last hetero atom , in this case nitrogen , of the polyamide skeleton . in a further embodiment , the terminal chains are functionalized . in another embodiment , the ester groups of formula ( i ) are linked to the terminal and / or pendant fatty chains , represent from 15 % to 40 % of the total number of ester and amide groups , such as , for example , from 20 % to 35 %. in one embodiment , n may be an integer ranging from 1 to 5 , for example , an integer ranging from 3 to 5 . in the present invention , r 1 , which are identical or different , can , for example , each be chosen from c 12 to c 22 alkyl groups , such as from c 16 to c 22 alkyl groups . in the present invention , r 2 , which are identical or different , can , for example , each be chosen from c 10 to c 42 alkyl groups . at least 50 % of all r 2 , which are identical or different , can , for example , each be chosen from groups comprising from 30 to 42 carbon atoms . at least 75 % of all r 2 , which are identical or different , can , for example , each be chosen from groups comprising from 30 to 42 carbon atoms . in the two aforementioned embodiments , the remaining r 2 , which are identical or different , can , for example , each be chosen from c 4 to c 19 groups , such as c 4 to c 12 groups . r 3 , which can be identical or different , can , for example , each be chosen from c 2 to c 36 hydrocarbon - based groups and polyoxyalkylene groups . in another example , r 3 , which can be identical or different , can each , for example , be chosen from c 2 to c 12 hydrocarbon - based groups . in another embodiment , r 4 , which can be identical or different , can each be chosen from hydrogen atoms . as used herein , hydrocarbon - based groups may be chosen from linear , cyclic and branched , and saturated and unsaturated groups . the hydrocarbon - based groups can be chosen from aliphatic and aromatic groups . in one example , the hydrocarbon - based groups are chosen from aliphatic groups . the alkyl and alkylene groups may be chosen from linear , cyclic and branched , and saturated and unsaturated groups . in general , the pendant and terminal fatty chains may be chosen from linear , cyclic and branched , and saturated and unsaturated groups . the pendant and terminal fatty chains can be chosen from aliphatic and aromatic groups . in one example , the pendant and terminal fatty chains are chosen from aliphatic groups . according to the invention , the structuring of the liquid fatty phase is obtained with the aid of at least one structuring polymer , such as the at least one polymer of formula ( i ). the at least one polyamide polymer of formula ( i ) may , for example , be in the form of a mixture of polymers , and this mixture may also comprise a compound of formula ( i ) wherein n is equal to zero , i . e ., a diester . non - limiting examples of at least one polyamide polymer which may be used in the composition according to the present invention include the commercial products sold by arizona chemical under the names uniclear 80 and uniclear 100 . these are sold , respectively , in the form of an 80 % ( in terms of active material ) gel in a mineral oil and a 100 % ( in terms of active material ) gel . these polymers have a softening point ranging from 88_c to 94_c , and may be mixtures of copolymers derived from monomers of ( i ) c 36 diacids and ( ii ) ethylenediamine , and have a weight - average molecular mass of about 6000 . terminal ester groups result from esterification of the remaining acid end groups with at least one alcohol chosen from cetyl alcohol and stearyl alcohol . a mixture of cetyl and stearyl alcohols is sometimes called cetylstearyl alcohol . other non - limiting examples of at least one polyamide polymer which may be used in the composition according to the present invention include polyamide polymers resulting from the condensation of at least one aliphatic dicarboxylic acid and at least one diamine , the carbonyl and amine groups being condensed via an amide bond . examples of these polyamide polymers are those sold under the brand name versamid by the companies general mills inc . and henkel corp . ( versamid 930 , 744 or 1655 ) or by the company olin mathieson chemical corp . under the brand name onamid , in particular onamid s or c . these resins have a weight - average molecular mass ranging from 6000 to 9000 . for further information regarding these polyamides , reference may be made to u . s . pat . nos . 3 , 645 , 705 and 3 , 148 , 125 , the disclosures of which are hereby incorporated by reference . other examples of polyamides include those sold by the company arizona chemical under the references uni - rez ( 2658 , 2931 , 2970 , 2621 , 2613 , 2624 , 2665 , 1554 , 2623 and 2662 ) and the product sold under the reference macromelt 6212 by the company henkel . for further information regarding these polyamides , reference may be made to u . s . pat . no . 5 , 500 , 209 , the disclosure of which is hereby incorporated by reference . such polyamides display high melt viscosity characteristics . macromelt 6212 , for example , has a high melt viscosity at 190 ° c . of 30 - 40 poise ( as measured by a brookfield viscometer , model rvf # 3 spindle , 20 rpm ). in a further embodiment , the at least one polyamide polymer may be chosen from polyamide resins from vegetable sources . polyamide resins from vegetable sources may be chosen from , for example , the polyamide resins of u . s . pat . nos . 5 , 783 , 657 and 5 , 998 , 570 , the disclosures of which are herein incorporated by reference . in one embodiment , the at least one polyamide polymer may be present in the composition in an amount ranging , for example , from 0 . 5 % to 80 %, such as from 2 % to 60 %, further such as from 5 % to 40 %, by weight relative to the total weight of the composition . in a further embodiment the at least one polyamide polymer may be present in the composition in an amount ranging , for example , from 5 % to 25 % by weight relative to the total weight of the composition . in one embodiment , the at least one structuring polymer in the composition according to the invention corresponds to the polyamide polymers of formula ( i ). due to fatty chain ( s ), these polymers may be readily soluble in oils and thus lead to compositions that are macroscopically homogeneous even with a high content ( at least 25 %) of at least one structuring polymer . the at least one structuring polymer may have a softening point greater than 50_c , such as from 65_c to 190_c , and further such as from 70_c to 130_c , and even further such as from 80_c to 105_c . the film - forming polymer of the compositions may be chosen from any silicone resin that has film forming properties and any other organic material with film forming properties . in one embodiment , the film - forming silicone resin is chosen from silsesquioxanes and siloxysilicates . the use of silicone polymers or derivatives as film - forming agents in cosmetic compositions is known in the art . see , e . g ., u . s . pat . nos . 5 , 965 , 112 ; 5 , 800 , 816 ; 5 , 911 , 974 ; and 5 , 959 , 009 , the disclosures of which are incorporated by reference herein . silicone resin nomenclature is known in the art as “ mdtq ” nomenclature , whereby a silicone resin is described according to the various monomeric siloxane repeating units which make up the polymer . each letter of “ mdtq ” denotes a different type of unit . the symbol m denotes the monofunctional unit ( ch 3 ) 3 sio 1 / 2 . the unit is considered monofunctional because the silicone atom only shares one oxygen for the formation of the chain . at least one of the methyl groups can be replaced , e . g ., to give a unit with formula [ r ( ch 3 ) 2 ] sio 1 / 2 , as represented in the following structure : the symbol d denotes the difunctional unit ( ch 3 ) 2 sio 2 / 2 where two of the available bonds from the silicone atom are used for binding to oxygen for the formation of the polymeric chain . the “ d ” unit , which is the major building block of dimethicone oils , can be represented as : the symbol t denotes the trifunctional unit , ( ch 3 ) sio 3 / 2 and can be represented as as in the m unit , any methyl group could be replaced in d or t with a group r which is other than methyl . finally , the symbol q denotes a quadrifunctional unit sio 4 / 2 and can be represented as : there are a number of different silicones which can be manufactured . it would be clear to one skilled in the art that the properties of each of the silicones will vary depending on the type of monomer , the type of substitution , the size of the polymeric chain , and the degree of cross linking or size of the side chain . different properties are attained depending on whether the backbone is a silicone chain with carbon - based side chains or whether the backbone is carbon - based with silicone side chains . as described above , the film - forming silicone resin may be chosen from siloxysilicates and silsesquioxanes . any siloxysilicates or silsesquioxanes that function as a film - former are within the practice of the invention . in one embodiment , the film - forming silicone resin is chosen from substituted siloxysilicates and silsesquioxanes . a substituted siloxysilicate or a substituted silsesquioxane may be , for example , a siloxysilicate or a silsesquioxane where a methyl group has been substituted with a longer carbon chain such as an ethane , propane , or butane . the carbon chain may be saturated or unsaturated . in one embodiment , the film - forming silicone resin is chosen from siloxysilicates such as trimethylsiloxysilicates , which are represented by the following formula : [( ch 3 ) 3 — si — o ] x —( sio 4 / 2 ) y ( mq units ) where x and y can have values ranging from 50 to 80 . in a further embodiment , a siloxysilicate may be chosen from any combination of m and q units , such as , for example , [( r ) 3 — si — o ] x —( sio 4 / 2 ) y , where r is chosen from a methyl group and longer carbon chains . in a further embodiment , the film - forming silicone resin is chosen from silsesquioxanes that are represented by the following formula : ( ch 3 sio 3 / 2 ) x ( t units ) where x has a value of up to several thousand and the ch 3 may be replaced by an r , as described above for t units . in one embodiment , the silsesquioxane is chosen from polymethylsilsesquioxanes , which are silsesquioxanes that do not have a substituent replacing the methyl group . the polymethylsilsesquioxanes useful in the present invention are film - formers and can , for example , have about 500 or less t units , such as from about 50 to about 500 t units . in another embodiment , they have a melting point from about 40 ° c . to about 80 ° c . these silicone resins are soluble or dispersible in volatile silicones or other organic liquids . not all polymethylsilsesquioxanes are film - formers . for example , the highly polymerized polymethylsilsesquioxanes ( t resins ), such as tospearl ™ from toshiba or kmp590 from shin - etsu are highly insoluble and therefore are not effective film - formers . the molecular weight of these polymethylsilsesquioxanes is difficult to determine and they generally contain a thousand or more t units . other suitable polymethylsilsesquioxanes useful in accordance with the present invention include belsil pms mk , also referred to as resin mk , available from wacker chemie . this polymethylsilsesquioxane is a polymer primarily formed of polymerized repeating units of ch 3 sio 3 / 2 ( t units ) and which can also contain up to about 1 % ( by weight or by mole ) of ( ch 3 ) 2 sio 2 / 2 ( d units ). it is believed that the polymers are in a “ cage ” and “ ladder ” configuration as exemplified in the figure below . the weight - average molecular weight of the “ cage ” unit has been calculated to be 536 . the majority of the polymer is in the “ ladder ” configuration , where the ends are capped with ethoxy ( ch 3 ch 2 o ) groups . the weight percent of ethoxy present is about 4 . 5 % and the mole percent is about 7 % ( silicone units ). since this functionality can react with water , a small and variable amount of sioh can also be present . the weight - average molecular weight can be , for example , from about 500 to about 50 , 000 , such as about 10 , 000 . polymethylsilsesquioxanes suitable for use in the present invention also include kr - 220l available from shin - etsu . the structure of kr - 220l is made up of mostly silicone t - units ( ch 3 sio 3 / 2 ) with si — oh or silanol end units . there are no d units . other polymethylsilsesquioxanes that can be useful in the practice of the invention include kr - 242a , which has a structure of about 98 % methyl t units and about 2 % dimethyl d units with si — oh or silanol end units , and kr - 251 , which has a structure of about 88 % methyl t units and about 12 % dimethyl d units with si — oh or silanol end units , both of which are available from shin - etsu . in a further embodiment , the film - forming silicone resin is chosen from combinations of m , d , t , and q units comprising at least two units chosen from m , d , t , and q and that satisfy the relationship r n sio ( 4 − n )/ 2 wherein n is a value ranging from 1 . 0 to 1 . 50 . some resins of this type are disclosed in u . s . pat . no . 6 , 074 , 654 , the disclosure of which is incorporated by reference herein . r may be a methyl group or any carbon chain as long as the silicone resin retains its film forming properties . ( up to 5 %, of silanol or alkoxy functionality may also be present in the resin structure as a result of processing .) the film - forming silicone resins may be solid at about 25 ° c . and may have a molecular weight ranging from 1000 to 10000 grams / mole . in a further embodiment , the film - forming silicone resin comprises repeating m units and q units . the ratio of m units to q units may be , for example , 0 . 7 : 1 . the film - forming silicone resin may be chosen from wacker 803 and 804 available from wacker silicones corporation and g . e . 1170 - 002 from general electric . in a further embodiment , the film - forming silicone resin is a copolymer wherein at least one unit of the copolymer is chosen from m , d , t , and q silicone units and at least one additional unit of the copolymer is chosen from an ester . the film - forming silicone resin may be chosen from , for example , diisostearoyl trimethylolpropane siloxysilicates , such as sf 1318 , available from ge silicones . the film forming polymer may also be a silicone polymer such a high viscosity phenylated silicone such as phenyltrimethicone available as belsil pdm 1000 the film forming polymer of the compositions according to the present invention may also be a non silicone film former . this non silicone film former may be chosen from , for example , polyethylene ; vinylpyrrolidone / vinyl acetate ( pvp / va ) copolymers such as the luviskol ® va grades ( all ranges ) from basf ® corporation and the pvp / va series from isp ; acrylic fluorinated emulsion film formers including foraperle ® film formers such as foraperle ® 303 d from elf atochem ( although foraperle ® may not be appropriate for some cosmetic formulations ); ganex ® copolymers such as butylated pvp , pvp / hexadecene copolymer , pvp / eicosene copolymer or tricontanyl ; poly ( vinylpyrrolidone / diethylaminoethyl methacrylate ) or pvp / dimethylaminoethylmethacrylate copolymers such as copolymer 845 ; resin aco - 5014 ( imidized ib / ma copolymer ); other pvp based polymers and copolymers ; alkyl cycloalkylacrylate copolymers ( see wo 98 / 42298 , the disclosure of which is hereby incorporated by reference ); mexomere ® film formers and other allyl stearate / vinyl acetate copolymers ( allyl stearate / va copolymers ); polyolprepolymers such as ppg - 12 / smdi copolymer , polyolprepolymers such as ppg - 1 2 / sm di copolymer , poly ( oxy - 1 , 2 - ethanediyl ), α - hydro - ω - hydroxy - polymer with 1 , 1 ′- methylene - bis -( 4 - isocyanatocyclohexane ) available from barnet ; avalure ™ ac polymers ( acrylates copolymer ) and avalure ™ ur polymers ( polyurethane dispersions ), available from b f goodrich . the film former which also may be used within the framework of the invention includes film formers having any film former chemistry known in the art such as : pvp , acrylates , and urethanes ; synthetic polymers of the polycondensate type or free - radical type , or ionic type , polymers of natural origin and mixtures thereof or any other film former known within the practice of the cosmetic and pharmaceutical arts which one skilled in the art may determine to be compatible . film formers that may be used are also disclosed in the international cosmetic ingredient dictionary and handbook vol . 2 ( 7 th ed . 1999 ), more particularly the emollients disclosed on pages 1636 - 1638 . the disclosure of the international cosmetic ingredient dictionary and handbook vol . 2 , pages 1636 - 1638 , is hereby incorporated by reference . an appropriate concentration of the film former may be determined by one of skill in the art and can vary considerably based on the application . for example , for cosmetic compositions , the film former may be used in an amount from 0 . 1 % to 20 % such as , for example , from 1 % to 10 % by weight , relative to the total weight of the composition . the concentrations of the film - forming polymer and of the at least one structuring polymer may be chosen according to the desired hardness and desired stability of the compositions and according to the specific application envisaged . the respective concentrations of the at least one structuring polymer and of the at least one solid substance can be such that a disintegrable solid which does not flow under its own weight is obtained . depending on the intended application , such as a stick , hardness of the composition may also be considered . the hardness of a composition may , for example , be expressed in grams ( g ). the composition of the present invention may , for example , have a hardness ranging from 20 g to 2000 g , such as from 20 g to 900 g , and further such as from 20 g to 600 g . this hardness is measured in one of two ways . a first test for hardness is according to a method of penetrating a probe into said composition and in particular using a texture analyzer ( for example ta - xt2 from rhéo ) equipped with an ebonite cylinder of height 25 mm and diameter 8 mm . the hardness measurement is carried out at 20 ° c . at the center of 5 samples of said composition . the cylinder is introduced into each sample of composition at a pre - speed of 2 mm / s and then at a speed of 0 . 5 mm / s and finally at a post - speed of 2 mm / s , the total displacement being 1 mm . the recorded hardness value is that of the maximum peak observed . the measurement error is ± 50 g . the second test for hardness is the “ cheese wire ” method , which involves cutting an 8 . 1 mm tube of composition and measuring its hardness at 20 ° c . using a dfghs 2 tensile testing machine from indelco - chatillon co . at a speed of 100 mm / minute . the hardness value from this method is expressed in grams as the shear force required to cut a stick under the above conditions . according to this method , the hardness of compositions according to the present invention which may be in stick form may , for example , range from 30 g to 300 g , such as from 30 g to 250 g , and further such as from 30 g to 200 g . the hardness of the composition of the present invention may be such that the compositions are self - supporting and can easily disintegrate to form a satisfactory deposit on a keratinous material . in addition , this hardness may impart good impact strength to the inventive compositions which may be molded or cast , for example , in stick or dish form . the skilled artisan may choose to evaluate a composition using at least one of the tests for hardness outlined above based on the application envisaged and the hardness desired . if one obtains an acceptable hardness value , in view of the intended application , from at least one of these hardness tests , the composition falls within the scope of the invention . according to the present invention , the compositions in stick form may also possess the properties of deformable , flexible elastic solids and may also have noteworthy elastic softness upon application to a keratinous material . the compositions in stick form of the prior art do not have this elasticity and flexibility . the at least one structuring polymer has an affinity with the fatty phase and in particular with a chemical portion of one of the oils forming the liquid fatty phase of the composition so that physical links with the oils , such as hydrogen bonds are formed . the at least one liquid fatty phase , in one embodiment , may comprise at least one oil . the at least one oil , for example , may be chosen from polar oils and apolar oils including hydrocarbon - based liquid oils and oily liquids at room temperature . in one embodiment , the compositions of the invention comprise at least one structuring polymer and at least one polar oil . the polar oils of the invention , for example , may be added to the apolar oils , the apolar oils acting in particular as co - solvent for the polar oils . according to the invention , the structuring of the at least one liquid fatty phase may , for example , be obtained with the aid of at least one polymer of formula ( i ). in general , the polymers of formula ( i ) may be in the form of mixtures of polymers , these mixtures also possibly containing a synthetic product corresponding to a compound of formula ( i ) in which n is 0 , i . e ., a diester . the liquid fatty phase of the composition may contain more than 30 %, for example , more than 40 %, of liquid oil ( s ) containing a group similar to that of the units containing a hetero atom of the structuring polymer , and for example from 50 % to 100 %. in one embodiment , the liquid fatty phase structured with a polyamide - type skeleton contains a high quantity , i . e ., greater than 30 %, for example greater than 40 % relative to the total weight of the liquid fatty phase , or from 50 % to 100 %, of at least one apolar , such as hydrocarbon - based , oil . for the purposes of the invention , the expression “ hydrocarbon - based oil ” means an oil essentially comprising carbon and hydrogen atoms , optionally with at least one group chosen from hydroxyl , ester , carboxyl , and ether groups . for a liquid fatty phase structured with a polymer containing a partially silicone - based skeleton , this fatty phase may contain more than 30 %, for example , more than 40 %, relative to the total weight of the liquid fatty phase and , for example , from 50 % to 100 %, of at least one silicone - based liquid oil , relative to the total weight of the liquid fatty phase . for a liquid fatty phase structured with an apolar polymer of the hydrocarbon - based type , this fatty phase may contain more than 30 %, for example more than 40 % by weight , or from 50 % to 100 % by weight , of at least one liquid apolar , such as hydrocarbon - based , oil , relative to the total weight of the liquid fatty phase . for example , the at least one polar oil useful in the invention may be chosen from : hydrocarbon - based plant oils with a high content of triglycerides comprising fatty acid esters of glycerol in which the fatty acids may have varied chain lengths from c 4 to c 24 , these chains possibly being chosen from linear and branched , and saturated and unsaturated chains ; these oils are chosen from , for example , wheat germ oil , corn oil , sunflower oil , karite butter , castor oil , sweet almond oil , macadamia oil , apricot oil , soybean oil , cotton oil , alfalfa oil , poppy oil , pumpkin oil , sesame oil , marrow oil , rapeseed oil , avocado oil , hazelnut oil , grape seed oil , blackcurrant seed oil , evening primrose oil , millet oil , barley oil , quinoa oil , olive oil , rye oil , safflower oil , candlenut oil , passion flower oil and musk rose oil ; or alternatively caprylic / capric acid triglycerides such as those sold by stearineries dubois or those sold under the names miglyol 810 , 812 and 818 by dynamit nobel ; synthetic oils or esters of formula r 5 coor 6 in which r 5 is chosen from linear and branched fatty acid residues containing from 1 to 40 carbon atoms and r 6 is chosen from , for example , a hydrocarbon - based chain containing from 1 to 40 carbon atoms , on condition that r 5 + r 6 ≧ 10 , such as , for example , purcellin oil ( cetostearyl octanoate ), isononyl isononanoate , c 12 - c 15 alkyl benzoates , isopropyl myristate , 2 - ethylhexyl palmitate , isostearyl isostearate and alkyl or polyalkyl octanoates , decanoates or ricinoleates ; hydroxylated esters such as isostearyl lactate and diisostearyl malate ; and pentaerythritol esters ; c 8 to c 26 fatty alcohols such as oleyl alcohol ; and c 8 to c 26 fatty acids such as oleic acid , linolenic acid or linoleic acid . the at least one apolar oil according to the invention is chosen from , for example , silicone oils chosen from volatile and non - volatile , linear and cyclic polydimethylsiloxanes ( pdmss ) that are liquid at room temperature ; polydimethylsiloxanes comprising alkyl or alkoxy groups which are pendant and / or at the end of the silicone chain , the groups each containing from 2 to 24 carbon atoms ; phenylsilicones such as phenyl trimethicones , phenyl dimethicones , phenyl trimethylsiloxy diphenylsiloxanes , diphenyl dimethicones , diphenyl methyldiphenyl trisiloxanes and 2 - phenylethyl trimethylsiloxysilicates ; hydrocarbons chosen from linear and branched , volatile and non - volatile hydrocarbons of synthetic and mineral origin , such as volatile liquid paraffins ( such as isoparaffins and isododecane ) or non - volatile liquid paraffins and derivatives thereof , liquid petrolatum , liquid lanolin , polydecenes , hydrogenated polyisobutene such as parleam ®, and squalane ; and mixtures thereof . the structured oils , for example those structured with polyamides such as those of formula ( i ) or the polyurethanes or polyureas or polyurea - urethanes , may be , in one embodiment , apolar oils , such as an oil or a mixture of hydrocarbon oils chosen from those of mineral and synthetic origin , chosen from hydrocarbons such as alkanes such as parleam ® oil , isoparaffins including isododecane , and squalane , and mixtures thereof . these oils may , in one embodiment , be combined with at least one phenylsilicone oil . the liquid fatty phase , in one embodiment , contains at least one non - volatile oil chosen from , for example , hydrocarbon - based oils of mineral , plant and synthetic origin , synthetic esters or ethers , silicone oils and mixtures thereof . in practice , the total liquid fatty phase may be present , for example , in an amount ranging from 1 % to 99 % by weight relative to the total weight of the composition ; further examples include ranges of 5 to 95 . 5 %, 10 % to 80 % and 20 % to 75 %. for the purposes of the invention , the expression “ volatile solvent or oil ” means any non - aqueous medium capable of evaporating on contact with the skin or the lips in less than one hour at room temperature and atmospheric pressure . the volatile solvent ( s ) of the invention is ( are ) organic solvents , such as volatile cosmetic oils that are liquid at room temperature , having a non - zero vapor pressure , at room temperature and atmospheric pressure , ranging in particular from 10 − 2 to 300 mmhg and , for example , greater than 0 . 3 mmhg . the expression “ non - volatile oil ” means an oil which remains on the skin or the lips at room temperature and atmospheric pressure for at least several hours , such as those having a vapor pressure of less than 10 − 2 mmhg . according to the invention , these volatile solvents may facilitate the staying power or long wearing properties of the composition on the skin , the lips or superficial body growths . the solvents can be chosen from hydrocarbon - based solvents , silicone solvents optionally comprising alkyl or alkoxy groups that are pendant or at the end of a silicone chain , and a mixture of these solvents . the volatile oil ( s ), in one embodiment , is present in an amount ranging from 0 % to 95 . 5 % relative to the total weight of the composition , such as from 2 % to 75 % or , for example , from 10 % to 45 %. this amount will be adapted by a person skilled in the art according to the desired staying power or long wearing properties . sunscreens according to this invention which are chemical absorbers actually absorb harmful ultraviolet radiation . it is well known that chemical absorbers are classified , depending on the type of radiation they protect against , as either uv - a or uv - b absorbers . uv - a absorbers generally absorb radiation in the 320 to 400 nm region of the ultraviolet spectrum . uv - a absorbers include anthranilates , benzophenones , and dibenzoyl methanes . uv - b absorbers generally absorb radiation in the 280 to 320 nm region of the ultraviolet spectrum . uv - b absorbers include p - aminobenzoic acid derivatives , camphor derivatives , cinnamates , and salicylates . classifying the chemical absorbers generally as uv - a or uv - b absorbers is accepted within the industry . however , a more precise classification is one based upon the chemical properties of the sunscreens . there are eight major classifications of sunscreen chemical properties which are discussed at length in “ sunscreens — development , evaluation and regulatory aspects ,” by n . shaath et al ., 2nd . edition , pages 269 - 273 , marcel dekker , inc . ( 1997 ). this discussion , in its entirety , is incorporated by reference herein . the sunscreens which may be formulated according to the present invention typically comprise chemical absorbers , but may also comprise physical blockers . exemplary sunscreens which may be formulated into the compositions of the present invention are chemical absorbers such as p - aminobenzoic acid derivatives , anthranilates , benzophenones , camphor derivatives , cinnamic derivatives , dibenzoyl methanes ( such as avobenzone also known as parsol ® 1789 ), diphenylacrylate derivatives , salicylic derivatives , triazine derivatives , benzimidazole compounds , bis - benzoazolyl derivatives , methylene bis -( hydroxyphenylbenzotriazole ) compounds , the sunscreen polymers and silicones , or mixtures thereof . these are variously described in u . s . pat . nos . 2 , 463 , 264 , 4 , 367 , 390 , 5 , 166 , 355 and 5 , 237 , 071 and in ep - 0 , 863 , 145 , ep - 0 , 517 , 104 , ep - 0 , 570 , 838 , ep - 0 , 796 , 851 , ep - 0 , 775 , 698 , ep - 0 , 878 , 469 , ep - 0 , 933 , 376 , ep - 0 , 893 , 119 , ep - 0 , 669 , 323 , gb - 2 , 303 , 549 , de - 1 , 972 , 184 and wo - 93 / 04665 , also expressly incorporated by reference . also exemplary of the sunscreens which may be formulated into the compositions of this invention are physical blockers such as cerium oxides , chromium oxides , cobalt oxides , iron oxides , red petrolatum , silicone - treated titanium dioxide , titanium dioxide , zinc oxide , and / or zirconium oxide , or mixtures thereof . a wide variety of sunscreens is described in u . s . pat . no . 5 , 087 , 445 , issued to haffey et al . on feb . 11 , 1992 ; u . s . pat . no . 5 , 073 , 372 , issued to turner et al . on dec . 17 , 1991 ; and chapter viii of cosmetics and science and technology by segarin et al ., pages 189 et seq . ( 1957 ), all of which are incorporated herein by reference in their entirety . sunscreens which may be formulated into the compositions of the instant invention are those selected from among : aminobenzoic acid , amyldimethyl paba , cinoxate , diethanolamine p - methoxycinnamate , digalloyl trioleate , dioxybenzone , 2 - ethoxyethyl p - methoxycinnamate , ethyl 4 - bis ( hydroxypropyl ) aminobenzoate , 2 - ethylhexyl - 2 - cyano - 3 , 3 - diphenylacrylate , ethylhexyl p - methoxycinnamate , 2 - ethylhexyl salicylate , glyceryl aminobenzoate , homomenthyl salicylate , homosalate , 3 - imidazol - 4 - ylacrylic acid and ethyl ester , methyl anthranilate , octyldimethyl paba , 2 - phenylbenzimidazole - 5 - sulfonic acid and salts , red petrolatum , sulisobenzone , titanium dioxide , triethanolamine salicylate , n , n , n - trimethyl - 4 -( 2 - oxoborn - 3 - ylidene methyl ) anillinium methyl sulfate , and mixtures thereof . sunscreens active in the uv - a and / or uv - b range can also include : benzene 1 , 4 - di ( 3 - methylidene - 10 - camphosulfonic ) acid and salts thereof ( the product mexoryl sx described in u . s . pat . no . 4 , 585 , 597 issued to lange et al . on apr . 29 , 1986 ), dispersed 2 , 2 ′- methylene - bis -[ 6 -( 2h - benzotriazol - 2 - yl )- 4 -( 1 , 1 , 3 , 3 - tetramethylbutyl ) phenol ] such as that marketed under the trademark mixxim bb / 100 by fairmount chemical , or , micronized in dispersed form thereof such as that marketed under the trademark tinosorb m by ciba - geigy , and solubilized 2 , 2 ′- methylene - bis -[ 6 -( 2h - benzotriazol - 2 - yl )- 4 -( methyl ) phenol ] such as that marketed under the trademark mixxim bb / 200 by fairmount chemical . the dibenzoyl methane derivatives other than avobenzone are described , for example , in fr - 2 , 326 , 405 , fr - 2 , 440 , 933 and ep - 0 , 114 , 607 , hereby expressly incorporated by reference . other dibenzoyl methane sunscreens other than avobenzone include ( whether singly or in any combination ): additional sunscreens that can be used are described in pages 2954 - 2955 of the international cosmetic ingredient dictionary and handbook ( 9 th ed . 2002 ). the at least one liquid fatty phase of the compositions of the invention may further comprise a dispersion of lipid vesicles . the compositions of the invention may , for example , be in the form of a fluid simple emulsion , a fluid multiple emulsion , a rigid simple emulsion or a rigid multiple emulsion . the simple emulsion or multiple emulsion may comprise a continuous phase chosen from an aqueous phase optionally containing dispersed lipid vesicles or oil droplets , or a fatty phase optionally containing dispersed lipid vesicles or water droplets . in one embodiment , the composition has a continuous oily phase or fatty phase , may contain less than 10 % by weight of water and be in the form of a stick or a dish . the compositions of the invention may further comprise at least one additional fatty material . the at least one additional fatty material may , for example , be chosen from gums , fatty materials pasty at ambient temperature , and resins . the compositions of the invention may further include formulation aids which are usually employed in the field of application envisaged . the formulation aids used in the present invention can be , but are not limited to , fatty substances . useful fatty substances include , but are not limited to , organic and organosilicone emulsifiers for water - in - oil systems . examples of organic emulsifiers include any ethoxylated surfactants known in the art such as polysorbate - 20 , laureth - 7 , laureth - 4 , sepigel ® 305 available from seppic and other similar ingredients disclosed in the international cosmetic ingredient dictionary and handbook vol . 4 ( 9 th ed . 2002 ), more particularly the emulsifiers disclosed on pages 2962 - 2971 . the disclosure of the international cosmetic ingredient dictionary and handbook vol . 4 , pages 2962 - 2971 , is hereby incorporated by reference . examples of organosilicone emulsifiers include cetyl dimethicone copolyol - polyglyceryl - 4 - isostearate - hexylaurate ( abil ® we 09 ) available from goldschmidt chemical corporation , cetyl dimethicone copolyol ( abil ® em 90 ), ( abil ® em 97 ), laurylmethicone copolyol ( 5200 ), cyclomethicone ( and ) dimethicone copolyol ( dc 5225 c and dc 3225 c ) available from ge silicones , cyclopentasiloxane & amp ; dimethicone copolyol ( ge sf 1528 ) or any other formulation aids known by one of skill in the art . other fatty substances useful as formulation aids include but are not limited to , silicones in esterified or unesterified liquid form or in esterified solid form , such as behenate dimethicone ; and non - silicone fatty substances including oils such as vegetable and mineral oil ; animal and / or synthetic waxes such as beeswax , parafin , rice bran wax , candelilla wax , carnauba wax and derivatives thereof ; and hydrocarbon gels or bentone type gels , such as gel ss71 , gel ea2786 , quaternium - 18 bentonite , 38 ce , gel isd v or gel isd . these substances may be selected variously by the person skilled in the art in order to prepare a composition which has the desired properties , for example , consistency or texture . plasticizers may also be added to the compositions to improve the flexibility and cosmetic properties of the resulting formulation . plasticizers are materials which soften synthetic polymers . they are frequently required to avoid brittleness and cracking of film formers . one skilled in the art may routinely vary the amount of plasticizer desired based on the properties desired and the application envisaged . plasticizers useful in the practice of the invention include lecithin , polysorbates , dimethicone copolyol , glycols , citrate esters , glycerin , dimethicone , and other similar ingredients disclosed in the international cosmetic ingredient dictionary and handbook vol . 4 ( 9 th ed . 2002 ), more particularly the plasticizers disclosed on page 2927 . the disclosure of the international cosmetic ingredient dictionary and handbook vol . 4 , page 2927 , is hereby incorporated by reference . the composition of the present invention may also further comprise at least one suitable additive commonly used in the field concerned chosen from coloring agents , antioxidants , essential oils , preserving agents , fragrances , fillers , pasty fatty substances , waxy fatty substances , neutralizing agents , liposoluble polymers , and cosmetically active agents and dermatological active agents such as , for example , emollients , moisturizers , vitamins and essential fatty acids . the compositions of the invention may also be optionally thickened with an aqueous - phase thickener or gelled with a gelling agent and / or containing ingredients soluble in water . in one embodiment , a suitable additive is chosen from a wax . as used herein , a “ wax ” may be any lipophilic fatty compound . non - limiting examples of such waxes include waxes of natural origin , such as beeswax , carnauba wax , candelilla wax , ouricury wax , japan wax , cork fiber wax , sugar cane wax , paraffin waxes , lignite wax , microcrystalline waxes , lanolin wax , montan wax and ozokerites , hydrogenated oils such as hydrogenated jojoba oil , jojoba esters , waxes of synthetic origin , such as polyethylene waxes derived from polymerization of ethylene , waxes obtained by fischer - tropsch synthesis , fatty acid esters and glycerides , and silicone waxes such as derivatives of poly ( di ) methylsiloxane . the wax , in one embodiment , is present in an amount ranging from 0 . 5 % to 15 % relative to the total weight of the composition , such as from 0 . 1 % to 10 %. another embodiment of the invention relates to a skin lip , or keratinous fiber care or make - up composition comprising a structured composition containing at least one liquid fatty phase structured with at least one structuring polymer comprising a polymer skeleton comprising at least one hydrocarbon - based repeating unit comprising at least one hetero atom and at least one sunscreen agent . additionally , an embodiment of the invention relates to a skin , lip , or keratinous fiber care or make - up composition comprising a structured composition containing at least one liquid fatty phase structured with at least one structuring polymer comprising a polymer skeleton comprising at least one hydrocarbon - based repeating unit comprising at least one hetero atom , at least one sunscreen agent , and at least one coloring agent . additionally , an embodiment of the invention relates to a method of making up skin , lips , or keratinous fibers or caring for skin , lips , or keratinous fibers comprising applying to said skin , lips , or keratinous fibers a structured composition containing at least one liquid fatty phase structured with at least one structuring polymer comprising a polymer skeleton comprising at least one hydrocarbon - based repeating unit comprising at least one hetero atom at least one sunscreen agent needless to say , the person skilled in the art will take care to select the optional additional additives and the amount thereof such that not all of the possible advantageous properties of the composition according to the invention are , or are substantially , adversely affected by the addition ( s ) envisaged . the transfer resistance of a composition may be evaluated by a transfer resistance test . a composition is applied to the clean , bare skin of a group of subjects as a smooth , thin layer , such as a 1 ″× 1 ″ square in size . the composition is allowed to air dry for 5 minutes and using a facial tissue or other cloth or sponge and medium pressure the area is wiped as if attempting to wipe the product off of the skin . the subjects are then asked to evaluate the results . positive results are described as the presence of a makeup film that could not be easily removed without soap and water . for example , the results may be rated on a scale of 1 to 5 with 5 being the best and 1 being the worst . the packaging and application device for any subject of the invention may be chosen and manufactured by persons skilled in the art on the basis of their general knowledge , and adapted according to the nature of the composition to be packaged . indeed , the type of device to be used can be in particular linked to the consistency of the composition , in particular to its viscosity ; it can also depend on the nature of the constituents present in the composition , such as the presence of volatile compounds . the present invention is also directed to a cosmetic process for caring for , making up or treating a keratinous material , such as that of a human being , and further such as human skin , lips , or keratinous fibers , comprising the application to a keratinous material of a cosmetic composition comprising at least one polyamide polymer comprising a polyamide skeleton . the polyamide skeleton comprises at least one end group with at least one chain chosen from alkyl chains comprising at least four carbon atoms and alkenyl chains comprising at least four carbon atoms , bonded to the at least one polyamide skeleton via at least one linking group . the polyamide skeleton may further comprise at least one pendant group with at least one chain chosen from alkyl chains comprising at least four carbon atoms and alkenyl chains comprising at least four carbon atoms , bonded to any carbon or nitrogen of the polyamide skeleton via at least one linking group . the composition also may contain at least one sunscreen agent . in another embodiment , the present invention is directed to a process of making a cosmetic composition in the form of a physiologically acceptable composition comprising including in said composition at least one polyamide polymer comprising a polyamide skeleton . the polyamide skeleton comprises at least one end group with at least one chain chosen from alkyl chains comprising at least four carbon atoms and alkenyl chains comprising at least four carbon atoms , bonded to the at least one polyamide skeleton via at least one linking group . the polyamide skeleton may further comprise at least one pendant group with at least one chain chosen from alkyl chains comprising at least four carbon atoms and alkenyl chains comprising at least four carbon atoms , bonded to any carbon or nitrogen of the polyamide skeleton via at least one linking group . the composition also comprises at least one sunscreen agent . the invention will be illustrated by , but is not intended to be limited to , the following examples . example 1 is the comparative example not containing the hetero polymer and example 2 contains the hetero polymer . 1 2 phase trade name inci name % w / w % w / w a1 uniclear polyamide 0 4 . 10 100vg octyl octyl dodecanol 3 . 96 3 . 80 dodecanol finsolv tn c12 - c15 benzoate 3 . 13 3 . 00 parsol mcx ethylhexyl 4 . 17 4 . 00 methoxycinnamate wickenol 151 isononyl isononanoate 7 . 30 7 . 00 a2 coated pigments 12 . 51 12 a3 arlacel p135 peg - 30 dihydroxylstearate 2 . 09 2 . 00 retinyl palmitate 0 . 31 0 . 30 a4 dc 200 fluid dimethicone 7 . 30 7 . 00 10 cst ksp - 100 dimethicone / vinyl 3 . 13 3 . 00 dimethicone crosspolymer a5 butylparaben butylparaben 0 . 31 0 . 30 bentone 38v disteardimonium hectorite 1 . 25 1 . 20 a6 dc 245 fluid cyclopentasiloxane 5 . 21 5 . 00 a7 ganzpearl fillers 5 . 21 5 . 00 gmx - 0610 a8 permethyl isododecane 10 . 43 10 . 00 99a b water water 30 . 24 29 . 00 glycerine glycerine 2 . 09 2 . 00 magnesium magnesium sulfate 0 . 52 0 . 50 sulfate methylparaben methylparaben 0 . 21 0 . 20 phenoxyethanol phenoxyethanol 0 . 63 0 . 60 total : 100 . 00 100 . 00 spf values are an average of spf values as measured on 5 subjects .
the present invention provides a transfer resistant cosmetic composition , which may also be pliable and / or comfortable to wear upon application to a substrate , and which also exhibit unexpected increases in sun protection factor , and contain at least one structuring polymer and at least one at least one sunscreen agent , products containing this composition , and methods of use thereof .