ALPINESTARS SMX-5 WATERPROOF BOOTS (47) (BLACK) 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 All-Round protection, 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 she 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