Features Leather and synthetic material upper Specific mx compound rubber sole Injection moulded plastic protections Personalized suede leather heat protector Adjustable velcro closure Replaceable/adjustable GH plastic buckles Steel toe cap Padded inner lining Polyurethane nylon reinforcements Soft polymer padding with memory foam I.S.S. (Incorporated Steel Shank) midsole Anti-bacterial replaceable footbed with A.P.S. (Air Pump System) A.P.S. System Air is pumped from a specific centralized position in the A.P.S. perforated footbed to the entire insole, consequently, air circulation within the boot keeps feet cool and comfortable.