The siren silicone cap is specially designed to be super stretchy to be over longer air, even whether intensive training or fitness swimming is your game, add some flair to your swimming set with this artful fun swimming cap. Material + fit: extra stretchy silicone is a durable swimming material that adapts to the shape of the head. The soft feel is gentle on the hair and protects it from water and chlorine. The slim surface and tight fit ensure hydrodynamic performance when swimming. PVC-free, extend the life of your swimming cap while washing in fresh water after use and air dry to keep it away from heat sources such as direct sunlight.