The S-MX 5 Waterproof boot has been created as a performance road and track boot, with built-in weather protection. Incorporating the latest technical footwear design and material know-how, the S-MX 5 WP is notable for its comfort, hugging fit, safety performance and wet weather performance. *Durable, high-tech micro-fiber upper construction offering a high level of flexibility. *Double injected PU shields the shin, ankle, calf, toe and heel from impact while minimizing abrasion. *Inner protection is given by a double injected panel connected to the heel counter, hidden beneath the outer shell and running up the outer ankle. *Quick drying polyamide lining is laminated with open cell foam and high density contoured padding to absorb shocks to the foot area. *The S-MX 5 boot is CE certified. *Alpinestars exclusive waterproof and breathable membrane liner ensures 100% weather protection, with an integrated gusset over entry aperture to prevent water penetration down the leg. *Innovative air vents at the ankle, heel and forefoot are covered with a specially designed mesh to provide unmatched levels of rider comfort. *Large ‘throat’ profile instep and Achilles flex bellows for superior flex and comfort. *MTP mesh liner and anatomical, removable, PU Foam foot bed keeps the foot cool and comfortable. *A fully vented version is also available in Black. *Innovative inner (medial) side entry opening/closure system that features an elastic mounted zipper with an extra wide Velcro® flap, to give a precise, comfortable fit and wide opening aperture for ease of access. *Highly ergonomic, lasting for ultra precise fit. *Exclusive compound rubber sole features structured shank reinforcement for added support to the arch area. *Interchangeable bi-injected PU toe slider with snap-in assembly.