Merrell Men's Inbound Chukka Boots Air Cushion polyurethane midsole with Spring Motion technology offers all-day shock absorption and control for support on various terrain. Stroebel construction gives the shoe added flexibility. Full-grain leather upper and linings are soft, breathable and easy to break in for a comfortable fit. Full-grain leather upper, leather upper lining and sockliner, EVA insole, polyurethane midsole, nylon shank, Vibram rubber outsole. Care: Buff with a leather cleaner or polish. Wipe off with dry cloth.