Just soak this cooling neck wrap in water for all day cooling. While soaking, the non-toxic, super absorbent polymers sewn inside the middle chamber, absorb hundreds of times their weight in water, keeping the wearer cool all day through the process of evaporation. No ice or refrigeration is required, making them easy to take on the go, anywhere! Dip in water to refresh and reuse over and over. Secured with a snap for your safety. Custom and bulk orders upon request. 100% Polyester