Excellent function: waterproof effectProtects your ears and hair.Comfortable and durable.And the high quality high-tech material is good for the environment. STURDY INTERIOR CONSTRUCTION: Made of high strength material.Prevent slipping and prevent water from entering. Note: Avoid contact with fire and sharp objects. After use, clean with detergent, rinse with water and change in the shade. Do not machine wash. The swimming cap is pure silicone product, so it has a special smell, wash it with water and the smell will disappear. Do not bleach.