A waterproof and breathable performance boot for track and street that is anatomically, the certified SMX 6 V2 DRYSTAR® has been carefully designed to give you a crucial performance edge in the form of protection innovations, improved ergonomics and comfort features. Features Newly designed boot upper incorporates innovative front, rear bellow and rear calf zones for superior levels of flexibility Main upper material constructed from advanced microfiber for durability and repeated abrasion resistance, plus a waterproof and breathable DRYSTAR® liner for excellent all-weather performance Ergonomic new last for forefoot streamlining to enable greater control of the bike’s controls and for superior, wide-ranging foot profile, fit and comfort Alpinestars’ innovative TPU lateral ankle brace protection provides a biomechanical support between lateral top calf/shin and ankle and offers improved structural integrity, protection against impact shocks, repeated abrasion resistance and flex support Alpinestars’ new and exclusive compound rubber sole promotes improved feel and grip, water dispersion and durability Air vents on the heel counter and shin plate improve comfort on short and long rides High modulus TPU injected shin guard, calf protector, heel counter, shift pad and toe slider for improved shock protection and durability Double density ankle protector on medial side layered under the upper offers protection in key area Integrated, replaceable bi-injected TPU slider features new easy screw fixing concept for quicker and easier replacement Innovative instep and Achilles accordion flex zone construction for superior comfort, extension, control and support Internal insole with the shank reinforcement integrated for support to the arch area and foot protection Medial side entry opening/closure system features elastic-mounted zipper with wide velcro closure for flexibility and secure fit. The aperture opening is large to promote easier entry/exit Internal toe box protection is layered under the upper for durability, improved feel and performance Dual compound removable anatomic footbed includes EVA and lycra for comfort and support The SMX-6 V2 DRYSTAR® Boot is certified