Contoured shin plate protector is injected with high modulus TPU for superior impact and abrasion resistance. -- U shaped calf protector is impact resistant and protects the ankle and calf area. Additional protection is provided by the top recessed buckle structure. -- Interchangeable bi-injected TPU toe slider with snap-in assembly. -- Wide and ventilated heel counter extends to the ankles and is combined with a shock absorbing padded insert and self-molding foam ankle protectors. -- Replaceable sliders are positioned in the back and external section of the heel to allow the boot to slide and absorb shocks. -- Injected TPU material extended to the toe area. -- Large instep fl ex zone for maximum comfort and fl exibility. -- Hi-tech microfi ber upper. -- Sole has been designed for improved feeling between the rider’s foot and the pegs of the motorcycle. -- Instep speed lacing closure and a unique lateral zipper. -- Replaceable ratchet buckle closure on the calf features a hidden strap for security and is integrated with a calf slider. -- Synthetic forefoot lining laminated with open cell foam. Highly breathable lining on ankle and leg areas. -- Alpinestars anatomical and replaceable countered footbed provides arch support and forefoot pedal feeling. -- The S-MX PLUS boot is CE certifi ed.