Lightweight and easy to activate product that will cool your head comfortably. , Fill with water and squeeze out any excess and enjoy immediate cooling, Performs best in low to medium humidity where airflow can reach the body determining the cooling effect, Stays 100% dry inside and out , Machine washable and has antibacterial properties , Easy to use and re-use , Provides up to 15 °C cooling relief below ambient temperature , Offers up to 3 days of cooling comfort, Exterior Nylon jersey 50%/PU 50%, Interior Nylon