The Aqua Cool Is An Awesome Upgrade From Your Basic Bandana. That''s Because It''s Made From A Super Absorbent Material That Soaks Up Water And Creates A Cooling Effect As It Evaporates. This Is A Great Way To Stay Comfy In Hot Weather, Either On The Trail Or Doing Work Around The Yard. Holds 12oz Of Water And Provides Evaporative Cooling For Up To 12 Hours.