1. Material: Silicone2. Size: 22x19.5cm3. High elastic silicone, not easy to deform, close to the head, allowing you to swim faster4. High elasticity, no deformation during stretching, comfortable to wear5. Both men and women can usePrecautions:1. Take the swimming cap home and rinse it clean, and dry it in the shade2. If the dirt is thick, try to let it spread naturally and let it go for a while. Do not squeeze the swimming cap.3. Ladies try not to keep hairpins in their hats, usually swimming every time they swim, this can prevent the swimming cap from getting moldy4. When swimming, the surface is easy to get dirty. Be sure to rinse the swimming cap with warm water and throw it away as much as possible before putting it into the cabinet. You can use a soft cloth soaked with detergent (bath or shampoo). Knead and wash gently, do not expose to the sun, hands are not easy to slip