The Hydroweave cap is one cool item. By combining three-layer evaporative technology with a lightweight, flexible fabric, patented Hydroweave harnesses the power of evaporation to keep the wearer cool and comfortable in any climate or situation.  Simply wet the cap and enjoy its cooling effects for up to 8 hours at a time, depending on conditions. Available in nine colors, this hat is a must for anyone who works or plays in conditions of extreme heat and humidity. It's machine-washable and  easily re-activated after each use. A revolutionary development, it can make all the difference between comfort and misery on a hot day. Order yours today... it's always cool!