Nike AeroBill Golf Hat has Nike AeroBill technology and laser-perforated side panels to keep you dry and cool. The fabric features 2-way stretch for a comfortable fit. - Nike AeroBill technology provides lightweight, breathable comfort. - Soft hook-and-loop closure lets you adjust your fit. - Laser-perforated side panels help keep you cool. - Swoosh design trademark is embroidered on the front panel. - 2-way stretch fabric provides a comfortable fit. - 100% POLYESTER