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. • Durable microfiber upper construction offering superb levels of flexibility and comfort. • 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 racederived 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. • Breathable textile interior lining features anti-sliding suede reinforcement on heel area. • Integrated, replaceable bi-injected TPU slider features new easy noscrew 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 Boot is CE certified.