Designed specifically for an optimized women's fit, the Stella S-MX 6 Vented incorporates the latest advancements in Alpinestars' performance footwear design and development. Every component on the CE-certified Stella S-MX 6 Vented has been carefully designed to give you a crucial performance edge or keep you on the track for longer, in the form of protection innovations, improved ergonomics and comfort features. Specifically engineered for women. Durable advanced microfiber upper construction offering superb levels of flexibility. Ergonomic new last for forefoot streamlining and superior fit and comfort. Innovative TPU lateral ankle brace protection provides biomechanical support between lateral top calf / shin and ankle and offers improved structural integrity. New Alpinestars' exclusive compound rubber sole promotes improved water run-off and grip. Air vents on the heel counter and shin plate plus breathable mesh inserts (vented model). High modulus TPU-injected shin guard, calf protector, heel counter, shift pad and lateral ankle brace. Double-density ankle protector on medial side layered under the upper. Integrated, replaceable bi-injected TPU slider features new easy screw fixing concept. Innovative instep and Achilles accordion flex zone construction for superior comfort, control and support. Internal insole with the shank reinforcement integrated for added support to the arch area. Medial side entry opening / closure system features elastic-mounted zipper with wide Velcro® brand hook-and-loop closure. Velcro® brand hook-and-loop tab locks the zip pull closed, keeping it flat and secure. Wide opening aperture for ease of access. Internal toe box protection is layered under the upper. Breathable textile interior lining features anti-sliding suede reinforcement on heel area. New removable anatomic footbed includes EVA and Lycra® for comfort and support. The SMX-6 boot is CE certified.