Top-grain leather upper construction for comfort and flexibility. Medial side of the boot protected by thick, abrasion- and heat-resistant suede with a unique stamped graphic. Soft, breathable internal boot liner. Stitched instep flex zone for maximum support. Lowered Achilles heel cutout for greater flexibility. Dual-compound toe guards for improved flexibility and increased impact protection. Buckles are high-impact TPU construction. High-grip PVC and hook-and-loop closure at top of boot. Outsole is an exclusive Alpinestars compound designed for high grip. Outsole is compression-molded around a contoured, tempered steel support shank.