Rubber sole QUICK DRYING: The water shoes comes with hollowed-out insole for rapid drainage, which could dry quickly in all directions. Ideal for beach, swimming, swimming pools, water skiing, sailing, boating and other water sports. Let your feet dry quickly. SOFT AND LIGHTWEIGHT: The aqua shoes is flexible just like socks. Wearing it makes you feel weightless in the water. While not wearing, it is also be foldable and easy to carry. NON SLIP: The soles are made of rubber and anti-skid pattern, which enhance grasp and slip resistance. It strongly support to protect your feet from gravel, stone and rough ground. COMFORTABLE WAERING: Super soft and elastic. Adjustable elastic band design of aqua shoes prevents chafing and convenient to wear and take off. Walking on sand and under water with no issues. CLEANING METHOD: Machine washing is accepted. Hand washing would be better. No machine dry.