100% Other Fibers Constructed from Frogg Toggs' exclusive, hyper-evaporative material that retains water while remaining dry to the touch Wetting the towel in water will allow it to activate quickly and cool up to 30 degrees Provides 3 to 4 hours (depending on conditions) of cooling relief while enduring outdoor heat and/or high levels of physical activity Can be used over and over and stored in the included hard-plastic storage tube Absorbs up to 8 times its weight in water and sweat