Alpinestars Women's Stella S-MX 5 Boots The Stella S-MX 5 has been created for women riders 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. Features All-Round protection, durable and 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 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 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