fig1 a and 1 b show a prior art ski system 10 . the system 10 includes a ski 12 and a boot 14 that has an upper cuff 16 attached to a lower boot 18 . pins 19 ( e . g ., rivets ) travel through corresponding holes 16 a , 18 a in upper cuff 16 and lower boot 18 to allow limited movement ( i . e ., plantar flexion and dorsiflexion ) between upper cuff 16 and lower boot 18 . lateral movement ( i . e ., inversion and eversion ) is not allowed due to the manner of attaching upper cuff 16 and lower boot 18 . when a wearer leans into boot 14 laterally , the whole boot 14 and ski 12 move as a single unit . this may allow the wearer to easily turn at high speeds or in other circumstances where fast direction changes are needed . this does not allow a wearer to balance in different ways while sliding on objects , however . a binding 13 is shown to attach boot 14 to ski 12 . people sliding ( also referred to as “ grinding ”) on rails and other objects with skis and snowboards , which is becoming increasingly popular , may benefit from boots with lateral flexibility because the lateral flexibility may provide the users with the ability to balance in different ways while sliding on objects . a laterally “ floating ” cuff may allow the lower boot and the cuff to move more independently of each other , and with more ankle flexibility a rider may angle his body differently to get better sliding style or even to perform totally new tricks with different stances . fig2 a and 2 b show a ski equipment system 20 for terrain adaptability according to an embodiment . system 20 includes a ski 22 and two boots 24 . each boot 24 has an upper cuff 26 attached to a lower boot 28 . it should be understood that ski 22 may be substituted for a snowboard , and the term “ gliding board ” may be used to refer to either a ski or a snowboard . though two boots 24 and two skis 22 may be included , only one boot 24 and one ski 22 are described in detail herein ; the undescribed boot 24 and ski 22 are substantially a mirror images of the described boot 24 and ski 22 , as is common in the art . pins 29 ( e . g ., rivets ) travel through corresponding slots 26 a and holes 28 a in upper cuff 26 and lower boot 28 , respectively . more particularly , upper cuff 26 may define opposed slots 26 a , and lower boot 28 may define opposed holes 28 a ; one pin 29 may couple one slot 26 a to one hole 28 a , and another pin 29 may couple another slot 26 a to another hole 28 a . when upper cuff 26 and lower boot 28 are attached in this manner , inversion ( fig3 a ), eversion ( fig3 b ), plantar flexion ( fig3 c ), and dorsiflexion ( fig3 d ) are allowed . a boot that is always laterally flexible may perform poorly when the wearer uses the skis / snowboards traditionally ( i . e ., not to slide on objects ) however , since the lateral flexibility may not allow the user to easily turn at high speeds or in other circumstances where fast direction changes are needed . locks 30 may be positioned adjacent upper cuff slots 26 a to selectively eliminate inversion and eversion or to selectively limit inversion and eversion . locks 30 may be joined together so that locks 30 may be actuated jointly , or locks 30 may be separate ( as shown throughout the drawings ) so that locks 30 may be actuated individually . a boot that is selectively laterally - flexible may be advantageous in that restricted lateral movement may be beneficial when skiing or snowboarding conventionally ( i . e ., not sliding on objects ) more lateral flexibility may be beneficial when sliding on objects with skis or snowboards , and the ability to adjust lateral flexibility may allow a user to switch between skiing / snowboarding conventionally and sliding on objects without changing boots . fig4 shows that each lock 30 may include a plurality of openings of various heights in communication with each other opening . alternately , each lock 30 may include a single opening having a height slightly larger than a diameter of pin 29 . opening 31 a is shown having a greater height than opening 31 b . heights of the openings are significant because they correspond to amounts of upper cuff slots 26 a that remain uncovered when locks 30 are actuated , and in this way they may selectively restrict movement of pins 29 . in other words , the amounts of upper cuff slots 26 a that remain uncovered may determine the amount of lateral movement between upper cuff 26 and lower boot 28 . various ratcheting devices , spring biasing devices , clamping devices , and / or other devices may be incorporated with each lock 30 to allow the wearer to actuate locks 30 . fig5 a shows lock 30 according to another embodiment . more particularly , lock 30 may be rotatable instead of slidable , and an opening 31 c may selectively reveal predetermined amounts of upper cuff slots 26 a . fig5 b shows rotatable lock 30 as in fig5 a in a different position to allow less lateral movement between upper cuff 26 and lower boot 28 than when lock 30 is at the position shown in fig5 a . fig6 and fig2 b show that one or more grind plate 40 may be attached to lower boot 28 to protect boot 24 from damage . grind plate 40 may be removably coupled to lower boot 28 by a bolt 42 ( fig2 a ) or other fastener , or grind plate 40 may be fixedly attached to lower boot 28 . grind plate 40 may contact an object 2 that the wearer is sliding on , especially if the wearer is pivoting inwardly or outwardly on his ankles or if lock 30 is actuated to greatly restrict lateral movement ( as shown in fig6 ). it should be appreciated that grind plate 40 may be sized such that grind plate 40 will rarely contact a ground surface when lock 30 is actuated ; this may allow a user to ski traditionally ( with no interference from grind plate 40 ) when lock 30 is actuated . contact between grind plate 40 and object 2 may keep boot 24 from contacting object 2 , thereby avoiding damage to boot 24 . grind plate 40 may be replaced or discarded when damaged . fig7 and 8 show a gliding board 22 with a board body 50 and a plurality of removable edge sections 52 . the removable edge sections 52 are specifically designed to provide the optimal edges for conventional skiing and snowboarding , and , with a change of an edge section 52 , the best edge for sliding or grinding . these edge sections 52 may be easily removed and replaced for a given activity or due to edge damage , and they may be constructed of metal , plastic , or composite materials , for example . the flexibility of edge sections 52 may be optimized depending on whether the user is skiing / snowboarding traditionally or sliding . for example , a gliding board 22 being used primarily for skiing / snowboarding traditionally may use edge sections 52 having a flexibility very close to that of the board 22 , while a gliding board 22 being used primarily for sliding may use edge sections 52 that are more or less flexible than the board 22 . flexible edges may be desirable when a user wants the board 22 to conform to the shape of the object being slid upon . edges that are not flexible may be desirable when a user is sliding on rough , high friction surfaces such as concrete , because by conforming less , the edge may reduce friction and allow for a better slide . fig7 and 8 also show that bolts 54 may pass through openings 51 in board body 50 and attach edge sections 52 to board body 50 . bolts 54 may be tightened adjacent an upper edge 50 a of board body 50 so that edge sections 52 may be pulled tightly to board body 50 . edge sections 52 may alternately be attached to board body 50 through bolts 54 that are not accessible from upper edge 50 a ( i . e ., bolts 54 may pass through a side of edge sections 52 ) tongue - and - groove fasteners , screws , clips , or other known fasteners . fig9 a shows a removable edge section 52 having a traditional ( sharp and square ) edge 52 a . edge 52 a may work well for cutting into snow , but it may catch on obstacles that are being slid upon . fig9 b shows a removable edge section 52 having a beveled edge 52 b . beveled edge 52 b may allow gliding board 22 to “ lock ” onto an object , making it easier for a user to balance or slide on obstacles . fig9 c shows a removable edge section 52 having a notched edge 52 c . notched edge 52 c is not as rounded as the beveled edge 52 b , but it may also allow the gliding board 22 to “ lock ” onto an object , making it easier for a user to balance or slide on obstacles . notched edge 52 c and beveled edge 52 b may provide different characteristics that different users prefer , and they each may be advantageous depending upon the object being slid upon . fig9 d shows a removable edge section 52 having an intentionally dulled edge 52 d . dulled edge 52 d may provide a user with additional control , and it may slow the sliding of gliding board 22 across an object . fig1 and 11 show a gliding board 22 with a plurality of removable edge and base sections 52 , 56 . this may be advantageous over the prior art because when edges 52 become damaged , especially due to rocks and rough terrain , the base of the board 22 is often damaged as well . edge and base sections 52 , 56 may be a single member as shown , or they may alternately be separate members . edge sections 52 may be optimized depending on whether the user is skiing / snowboarding traditionally or sliding as discussed above , and edge sections 52 may have a variety of configurations , including those shown in fig9 a through 9 d . base sections 56 may have a flexibility very close to that of the board 22 , and bolts 54 may pass through openings 51 in board body 50 and attach edge and base sections 52 , 56 to board body 50 . bolts 54 may be tightened adjacent upper edge 50 a of board body 50 so that edge and base sections 52 , 56 may be pulled tightly to board body 50 . edge and base sections 52 , 56 may alternately be attached to board body 50 through bolts 54 that are not accessible from upper edge 50 a ( i . e ., bolts 54 may pass through a side of edge sections 52 ) tongue - and - groove fasteners , screws , clips , or other known fasteners . fig1 shows a binding apparatus 60 that may be included in the ski equipment system 20 . bindings traditionally are used with skis and snowboards to attach a rider &# 39 ; s boot to the ski / snowboard , and prior art bindings are not easily adjustable in relation to the ski / snowboard . binding apparatus 60 may include top and bottom plates 62 , 64 , and a binding 65 may be attached to top plate 64 to extend upwardly therefrom , as shown . top and bottom plates 62 , 64 may be selectively coupled together ( i . e ., by bolts , screws , clamps , etc . ), and each plate 62 , 64 has a respective mating surface 62 a , 64 a ( shown in fig1 ) that may include complementary ridges and valleys 63 a , 63 b or a gripping texture ( i . e ., a durable rubber , etc .). bottom plate 64 is shown attached to board body 50 , and top plate 62 is shown attached to bottom plate 64 by bolts 66 . top plate 62 includes slots 67 ( shown in fig1 ) that allow top plate 62 to be adjusted relative to bottom plate 64 when bolts 66 are not tightened . slots 67 may be configured to allow top plate 62 to be adjusted laterally , longitudinally , and / or at an angle relative to bottom plate 64 . top and bottom plates 62 , 64 may each have a vertical flexibility similar to that of board 22 to minimize the effects of plates 62 , 64 on the vertical flexibility of board 22 . however , plates 62 , 64 may be laterally rigid to provide optimal energy transfer from a user &# 39 ; s boot 24 to board 22 . it should also be appreciated that plates 62 , 64 may be both vertically rigid and laterally rigid . other bindings 65 available on the market may also be used . though not shown , top and bottom plates 62 , 64 may be coupled by a tongue and groove system , and a locking mechanism ( e . g ., a high tension spring ) may be used to maintain top and bottom plates 62 , 64 at a chosen adjustment configuration . top and bottom plates 62 , 64 may also be coupled by a worm gear ( e . g ., a screw or bolt ), and adjusting the worm gear may force top plate 62 to move relative to bottom plate 64 . other coupling devices that allow top plate 62 to be adjusted relative to bottom plate 64 may also be utilized . fig1 shows binding apparatus 60 as in fig1 with an alternate binding 65 a . alternate binding 65 a has heel and toe sections 68 a , 68 b that are raised from board 22 . raised heel and toe sections 68 a , 68 b may allow board 22 to flex vertically more naturally than if heel and toe sections 68 a , 68 b were directly atop board 22 . fig1 shows binding apparatus 60 as in fig1 with bottom plate 64 mounted inside a recess 23 ( as in fig2 a ) in board 22 . by mounting bottom plate 64 in this manner ( so that a bottom surface and sides of bottom plate contact board 22 ) bottom plate 64 can be extremely securely connected to board 22 . fig1 shows binding apparatus 60 as in fig1 with top plate 62 having a grinding extension 70 . grinding extension 70 is sized to extend beyond an edge of board 22 , and grinding extension 70 includes an edge 72 specifically designed for sliding . edge 72 may be constructed of metal , plastic , or composite materials , for example , and edge 72 may have a flexibility chosen for particular applications as discussed above in relation to fig7 and 8 . edge 72 may have a variety of configurations , including configurations similar to those shown if fig9 a through 9 d . sliding on grinding extension 70 may allow a user to perform tricks not previously possible . fig1 shows a section of a prior art gliding board 1600 having a main body 1601 and left and right edges 1602 . main body 1601 has keys 1601 a and keyways 1601 b , and each edge 1602 has keys 1602 a and keyways 1602 b . keys 1601 a , 1602 a and keyways 1601 b , 1602 b collectively form tongue - and - groove assemblies to couple edges 1602 to main body 1601 . when a respective edge 1602 is broken , it will typically continue to pull away from the main body 1601 from the break point . fig1 shows a section of a gliding board 1700 according to an embodiment . gliding board 1700 has a main body 1701 and left and right edges 1702 . main body 1701 has keys 1701 a and keyways 1701 b , and each edge 1702 has keys 1702 a and keyways 1702 b . keys 1701 a , 1702 a and keyways 1701 b , 1702 b collectively form tongue - and - groove assemblies to couple edges 1702 to main body 1701 in a permanent or removable manner . main body 1701 may define channels ( or grooves ) 1704 , and connector members 1706 may pass through channels 1704 and couple left and right edges 1702 together . while connector members 1706 are shown attached to every third edge key 1702 a , more or fewer connector members 1706 may be used . when a respective edge 1702 is broken , connector members 1706 may hold the broken edge 1702 in place against main body 1701 . those skilled in the art appreciate that variations from the specified embodiments disclosed above are contemplated herein . the description should not be restricted to the above embodiments , but should be measured by the following claims .
gliding board equipment systems and individual components are disclosed herein . a gliding board equipment system of one embodiment includes a boot having an upper cuff and a lower boot . the upper cuff of the boot defines opposed slots , and a respective pin passes through each slot to couple the upper cuff to the lower boot and allow the upper cuff to move laterally relative to the lower boot . means are included for selectively covering at least one portion of each slot to restrict movement of the upper cuff relative to the lower boot .