Swim Faster - Less resistance and reduction of drag through,Swim caps with hydro dynamic, wrinkle-free design makes you swim faster. Suitable for male and female. High Quality - Last for thousands of hours in the pool. Made from premium quality silicone for maximum stretch and strength because of its tear-resistans. Built to last for all your swim meets and triathlons. Note - Though that these swim caps aren't fully waterproof, your hair might get wet depending on length and thickness of the hair and the head size. Comfortable Fit - Featuring great elasticity, can be stretched easily and not deformation after stretching, easy to put on and off, creates an comfortable fit for your head. Fit for hair styles of all length, such as long hair, shoulder length and short hair. Quantity delivered: 2 pieces Product color: black Product weight: about 60g