The Kool Towel Chilly Pad Cooling Sport Towel for Outdoor Activity, 79001, Blue Simply add water and the Kool Towel becomes significantly cooler than ambient temperature Provides cooling relief for 1 to 4 hours Made from hyper-evaporative material that holds water while feeling dry to the touch The Kool Towel keeps you up to 20% cooler Measures 25.5 x 17 Inch