With a durable microfiber upper for comfort and fit and incorporating a host of advanced protective features, inside and out, the SMX-S Boot features an ergonomic forefoot shaping, a breathable lining and Alpinestars exclusive rubber compound sole for optimized levels of support and performance. Features: Durable microfiber upper construction. Ergonomic new last for forefoot streamlining. New TPU shin plate protector. Lateral TPR injector ankle support construction. Integrated, replaceable bi-injected TPU slider features new easy no-screw fixing concept. Shift pad made from TPU. New, dual compound removable anatomic footbed includes EVA and Lycra. Alpinestars new and exclusive compound rubber sole. CE-certified. Alpinestars SMX-S Boots