The SMX Plus v2 Boot perfectly blends sleek sports styling with advanced protection features developed in Alpinestars performance footwear department. The durable and light microfiber upper is reinforced with a rugged polymer protector and the exclusive Multi-Link Control (MLC) system prevents ankle torsion while offering freedom of movement. Key Features: Dual density TPU replaceable toe slider with screw-in assembly providing protective coverage around the outer toe area. Replaceable heel slider and external side heel slider are positioned to dissipate and absorb shock and promote sliding during an accident. Large front and rear asymmetrical accordion zones are optimized to maximize flexibility for maximum comfort and improved safety. Micro adjustable ratchet top closure stows tab end. Advanced synthetic forefoot lining, laminated with open cell foam for shock absorption and highly breathable lining in ankle and leg areas for comfort. Alpinestars anatomical and replaceable countered EVA footbed provides arch support and forefoot pedal feeling. Durable sole, designed for improved riding feel, features evenly textured rubber for consistent grip. Inner instep speed lacing closure and unique lateral zipper offer precise and secure fit. Alpinestars Lace-Lock System is constructed from an advanced polymer resin to guarantee a quick, precise and secure closure. Hook and loop tap locks the zip pull close, keeping in flat and safe.