Alpinestars SMX-6 Men's Motorcycle Street Boots (Black/Red, EU Size 36) Main upper material constructed from advanced microfiber for durability and repeated abrasion resistance Alpinestars' innovative TPU lateral ankle brace protection provides a biomechanical support between lateral top calf/shin and ankle and offers improved structural integrity, protection against impact shocks, repeated abrasion resistance and flex support Alpinestars' new and exclusive compound rubber sole promotes improved feel and grip, water dispersion and durability Internal toe box protection is layered under the upper for durability, improved feel and performance The S-MX 6 boot is CE certified