About this item: Sole Material: recycled natural rubber. Outer Material: 55% nylon, 45% smooth leather. Closure Type: Slip-On, ⅞" wide nylon strap over top with quick release plastic clasp. Lining: 100% Textile. Water resistant. FOR MAXIMUM USAGE, hand wash & lay flat to air dry. This product is NOT Washer/Dryer Safe. Designed & developed in the United States. Original box included.