Hundreds of tiny crystals In Headband absorb up to 1000 times their own weight in water. Simply soak in cool water for 10 minutes, then wear—you’ll stay cool for hours. Made of soft, absorbent terry cloth on one side, 100% smooth cotton on the other. Hook-and-loop fasteners offer easy adjustment and super-quick on/off. Reversible and reusable. One size fits all. Available in four eye-catching colors—Denim Blue (No. 38833), Red Cowboy Print (No. 38834), Blue Cowboy Print (No. 40160) and Black (No. 40161).