Premium SiliconeThe kids swim hat is made of high-quality silicone, which has good breathability and waterproofness, not easy to fade or break. Swimming cap is easy to put on and take off, providing a good experience for your water sports. Comfortable Elastic FitThe kids swimming cap has good elasticity and extensibility and fit most boys and girls. The highly elastic silicone cap fits perfectly to the curve of the head without pulling the hair, providing comfort and good protection. Suitable RangeChildren swimming hat is 21.5cm x 19cm, which is more suitable for head circumference between 45-49cm, and can be worn by kids and adults. People with a head circumference of 41-44cm wear it loosely, and those with a head circumference greater than 57cm are very tight, it is not recommended to buy. Non-Slip WaterproofThe inside of the waterproof swimming cap has a non-slip texture design to ensure that the swimming cap will not slip off when in use. The raised brim prevents the cap from flipping up and entering the water while swimming, keeping your hair dry. Wide ApplicationSilicone swim cap can be used for daily swimming, swimming lessons and other water sports, it is also perfect for showering and protects your hair and ears well. Warning:Not to be used by children over 36 months.