The S-MX 5 has been created as a performance road and track boot, incorporating the latest technical footwear design and material know-how. Following on from the other performance boots in the Alpinestars range, the S-MX 5 is notable for its comfort, hugging fit, safety performance and ease of adjustability.            o Durable, high-tech micro-fiber upper construction offering a high level of flexibility.             o Double injected PU shields the shin, ankle, calf, toe and heel from impact while minimizing abrasion.             o 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.             o Quick drying polyamide lining is laminated with open cell foam and high density contoured padding to absorb shocks to the foot area.            o The S-MX 5 boot is CE certified.             o Innovative air vents at the ankle, heel and forefoot are covered with a specially designed mesh to provide unmatched levels of rider comfort.             o 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.