To provide a long-lasting cooling effect, the Iceman Ice Scarf simply needs to be soaked in water, which makes it ideal whether you have access to your kitchen sink or to the nearby lake. For extra cooling effect, place it in your fridge after soaking it. Details: Uses non-toxic crystal polymer cooling technology, reusable up to 30 times, activates by soaking in fresh water for 3-5 minutes, turn over occasionally to refresh, rinse after use and allow to fully air dry - do not leave in enclosed areas when wet, hand wash only, perfect for camping, sports, fitness and outdoor activities. Size: 42in x 2in. Material: Cotton.