Chill Mate body cooling products are designed to promote cooling relief and reduce discomfort in hot environments. Simply soak in cool water to activate and dry with a hand towel. Amazingly, the crystals absorb the water to leave the outside virtually dry to the touch. Through a clever heat exchange process the expanded crystals stay dry and cool for hours. Your Chill Mate becomes a flexible cool pack you can use for comfort in hot weather, or to assist in the repair of sports injuries, reduce pain, and lower fevers. Chill Mate Crystal Body Coolers are re-usable, safe, stylish, and effective. Prev.