fig1 shows generally as 1 , a person 2 , wearing headgear 3 , jacket 4 , gloves 5 , trousers 6 and boots 7 lined with reflective metal polymeric insulation material according to the invention . with reference to fig2 , this shows generally as 100 , a double layer , bubble - pack with aluminum foil insulation assembly adhered between the outer skin 202 and inner lining 204 of a jacket material . the double layer consists of a pair of bubble arrays 120 , 140 bonded together through an intervening low density polyethylene film 160 . arrays , 120 , 140 are formed of a plurality of bubble or sealed cavities 180 , 200 , respectively , from a 5 mil polyethylene film 220 , 240 , respectively . each of films 220 , 240 at their outer surfaces is bonded to a reflective aluminum foil 260 , 280 , respectively , to provide the whole assembly with external aluminum surfaces . assembly 100 has approximately twenty , 1 cm diameter , 0 . 5 cm high bubbles per 30 cm length and breadth within each of films 220 , 240 . the aforesaid assembly 100 is made by a double hot roller thermal and vacuum forming process for cavity forming and lamination sealing techniques known in the art . with reference to fig3 , this shows generally as 200 a composite double bubble - pack assembly according to the invention , having an aluminum foil 102 disposed between and bonded to bubble arrays 112 and 114 formed as for fig2 assembly . bubbles 118 and 120 are encapsulated between polyethylene films 116 and 128 . aluminum foil 102 has a low emissivity value of less than 5 % on each surface to essentially eliminate heat transfer by radiation . each of the single bubble - pack layers 112 , 114 provides both thermal conduction and convection insulation , and , in combination with the aluminum surfaces , excellent radiation insulation . the composite bubble - pack 100 offers significant resistance to heavy loading whereby appreciate non - breakage of the air bubbles is often found . preferably , outer layers 128 are made slightly thicker than inner layers 116 to better resist abrasion . additional water resistance or abrasion resistant films may be bonded or formed laminated to layer 128 . further , in consequence that composite assemblies of the invention have better thermal r - values than prior art assemblies , thinner or higher insulative assemblies may be provided . fig4 shows a bubble pack generally as 80 having a pair of insulative air chambers 81 created by inner spacers 88 laminated to individual bubble packs 82 , 84 . fig4 assembly also has a plurality of external spacers 83 adhered to outer layer 85 to define with layer 85 open cavities 87 , which when adhered or sewn to an inner or outer lining 90 of an article provides a sealed insulative air chamber 89 from open cavities 87 between the bubble pack assembly 88 and lining 90 . assembly 88 has a pair of aluminum laminate or metalized films 92 adhered together . with reference to fig5 to 16 the following numerals denote the same materials throughout the drawings , as follows : — 12 — 48 gauge aluminum metalized polyester ( pet ) film ; 14 — adhesive ; 16 — 1 . 2 ml polyethylene film ; 18 — 2 . 0 ml polyethylene film ( bubbled ); 20 — 1 . 2 ml ethylene vinyl acetate - polyethylene film ; 22 — 2 . 0 ml polyethylene film ; 24 — aluminum foil ; 26 — polyester scrim ; fr denotes 18 % w / w antimony oxide fire retardant ; w denotes presence of tio 2 pigment ( white ). the bubble pack layer is preferably of a thickness selected from 0 . 5 cm to 1 . 25 cm . the other polyethylene layers are each of a thickness , preferably , selected from 1 to 6 mls . although this disclosure has described and illustrated certain preferred embodiments of the invention , it is to be understood that the invention is not restricted to those particular embodiments . rather , the invention includes all embodiments which are functional or mechanical equivalence of the specific embodiments and features that have been described and illustrated .
an article having an inner article layer and an outer article layer to be worn by a mammal comprising a thermally insulating layer of a reflective metal polymeric insulation material adjacent to at least one of the inner and outer article layers . the insulation material provides enhanced thermal retention .