Kool Towel® keeps you cool during a workout, hard ride, tough climb, or can be used for a multitude of strenuous activities. Kool Towel® is made from a high tech hyper-evaporative material that keeps water within while feeling dry to the touch. To activate simply add water. The Kool Towel® becomes significantly cooler than the Ambient Temperature around, providing cooling relief to the user. The Kool Towel® continues to provide cooling relief for 1 to 4 hours (depending on conditions). To reactivate it, simply wet the towel again, in warm or cold water, wring out some excess water. Open the Kool Towel® Give it a few shakes in the air and it is cool again. Kool Towel® Facts Machine or Hand Washable(we recommend Non-Alkaline Liquid Soap) Measures 25.5 in. x 17 in. Keeps you upto 20°F