RealXGear Cooling Collar keeps you 20 degrees cooler than the outdoor ambient temperature. It’s like having your own air conditioner on you at all times. Keeps you cool all day long! and is reusable simply by soaking the collar in water. The cooling collar is machine washable and be used hundreds of times and comes in its own storage container for years of reliable use. RealXGear Sports Collars are made with durable, environmentally friendly super absorbent cloth. Made from a revolutionary highly evaporative material that retains water while remaining dry to the touch. When it stops cooling, simply re-wet the Real X Sports Towel in hot or cold water and wring it out. Within minutes, it’s cool again. It is ideal for swimming and all other outdoor activities!