High-Quality SiliconeChildren's swimming cap is made of high-quality silicone, which has good breathability and waterproof properties and is not easy to fade or break. The swimming cap is easy to put on and take off, providing a good experience for your water sports. Comfortable Elastic FitKids swimming cap has good elasticity and stretchability, suitable for most boys and girls. The highly elastic silicone cap perfectly fits the curve of the head without pulling the hair, providing comfort and good protection. Suitable RangeThe size of the children's swimming cap is 21.5 cm x 19 cm, which is more suitable for head circumference between 45-49 cm and can be worn by both children and adults. People with a head circumference of 41-44cm can wear it loosely, while people with a head circumference greater than 57cm can wear it very tightly, so it is not recommended to buy it. Anti-slip and 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 hat from flipping up and entering the water while swimming, keeping hair dry. Wide ApplicationThe silicone swim cap can be used for daily swimming, swimming lessons and other water sports, it is also great for showering and protects your hair and ears well.