Swimming cap for children made of silicone.

Its purpose is to keep the hair tightly close to the head and prevent hair from falling into the water. The cap creates less resistance and makes the swimmer's propulsion easier. In winter, it helps to keep the head warm. The cap does not keep the hair dry, but it limits contact with water and protects the hair from chlorinated water.
Silicone caps have the advantage of being elastic and safe. They are economical and do not require special care after each training session.