Leather and TPU upper gives protection, flexibility and comfort. -- Breathable liner. -- Outsole is an Alpinestars exclusive compound design for high abrasion protection and high grip. The outsole is compression molded around a contoured tempered steel support shank. -- Buckles are made from a high impact-resistant injection molded TPU. -- Lowered Achilles cutout for greater flexibility. -- High grip PVC and Velcro closure at top of boot. -- Medial side of boot is protected by thick, abrasion and heat resistant suede with unique heat stamped graphic. -- Instep flex zone stitched for maximum support. -- Dual compound TPU toe-guards for improved flexibility and increased impact protection.