IST 5mm Nylon Vulcanized Sole, Heel caps with Stopper, 6Heel caps with stopper: The boots are designed with heel caps that provide additional support and protection to the heel area, preventing potential injuries and enhancing stability. Secure fit: The boots are equipped with a closure system (such as a zipper or hook and loop strap) that ensures a secure and adjustable fit, minimizing water entry and maximizing comfort. Versatile use: The boots are suitable for various water activities, including scuba