Reef Tourer Marine Shoes (Adult) RA0107 Essential for Beach Play to Prevent Injuries; Product Features: Non-slip material on the heel prevents strap from slipping when wearing fins; Thick bottom grip sole and mid-cut to cover the ankle prevents injury to the foot. Uses a wide sole that fits Japanese feet, making it comfortable even after long periods of time wearing with drainage holes on the side to ensure breathability Color: BK (BL) Fabric: Nylon/Polyester Middle layer: Chloroprene rubber; Sole material type: Rubber sole