Australians know a thing or two about keeping a cool head in scorching weather! Unique, adjust-to-fit Outback hat is made from a lightweight, breathable fabric with advanced cooling technology. Wet with water, and the lining cools instantly, evaporating slowly to keep your head up to 20°F cooler than the outside temperature. A reflective UV-barrier blocks 99% of the suns harmful rays, a wide brim protects face and neck, and ventilation panels keep fresh air circulating for hours of cooling comfort. Packs flat. One size fits all.