Built for supreme temperature regulation and sun protection in the outdoors, the Coolhead performance ball cap is outfitted with UPF 50 fabrication, a wicking, cooling sweatband, and Columbia's advanced Omni-Freeze ZERO technology, which reacts with sweat to lower the temperature of the material. Omni-Freeze ZERO fabrication lowers the material's temperature. Omni-Freeze advanced cooling sweat band facilitates the release of heat and feels cooler to the touch. Omni-Shade UPF 50 provides premium protection from the sun. Hook and loop back adjustment.