Alpinestars SMX S Boot in Black A new addition to the to Alpinestars class-leading SMX range, the SMX-S Waterproof is constructed from a durable microfiber that incorporates class-leading performance and protective attributes as well as a breathable and waterproof membrane. Features Include: Durable microfiber upper construction offering superb levels of flexibility and comfort. Incorporating a waterproof and breathable membrane for high levels of comfort and weather performance. Ergonomic new last for forefoot streamlining to enable greater precision on the bike's controls and for superior, wide-ranging foot profile, fit and comfort. New, ergonomically optimized TPU shin plate protector is race derived for superior impact and abrasion resistance. Lateral TPR-injected ankle support construction offers optimized levels of protection and stability. TPU double density ankles protectors are layered under the upper in both lateral and medial side for excellent all-round levels of protection. Integrated, replaceable bi-injected TPU slider features new easy no screw fixing concept for quicker and easier replacement. Shift pad made from TPU incorporates technical texturing for protection and grip. Medial side entry opening/closure system features elastic-mounted zipper with wide Velcro closure for flexibility and secure fit. The aperture opening is large to promote easier entry/exit. Internal toe box protection is layered under the upper for durability, improved feel and performance. New, dual compound removable anatomic footbed includes EVA and Lycra for performance, comfort and support. Alpinestars' new and exclusive compound rubber sole promotes improved feel and grip, water dispersion and durability. SMX-S Waterproof Boot is CE certified.