Aetrex Men's Bio Boat Shoe 100% Leather Synthetic sole Heel measures approximately 1.5" Platform measures approximately 1.0" Leather upper and lining feels soft on your feet and provides breathability. Removable insole adds depth to enable the use of custom orthotics. Leather upper and upper lining, polyester fabric sockliner Polyurethane insole, midsole and outsole. Care: Spot clean with a damp cloth.