Waterproof and breathable Gore-Tex® racing boot. Air vents on the heel counter and shin plate. Main upper material constructed from advanced microfiber plus a Gore-Tex® liner. Race-tested TPU knuckle protection system. High modulus TPU injected shin guard, calf protector, heel counter, shift pad and toe slider. Opening / closure system with zipper and Velcro® brand hook-and-loop. Innovative instep and Achilles accordion flex zone construction. Dual compound removable anatomic footbed. Exclusively for KTM by Alpinestars. 57% polyurethane / 36% thermoplastic polyurethane / 4% TPR / 2% polyester / 1% nylon / 28,000 mm water column.