Top off your warm-weather look with the Nike AeroBill Tailwind Cap. Laser perforations strategically optimize breathability on the front and side panels, while moisture-wicking comfort helps you stay dry on the trail. This product is made with at least 50% recycled polyester fibersTop off your warm-weather look with the Nike AeroBill Tailwind Cap. Laser perforations strategically optimize breathability on the front and side panels, while moisture-wicking comfort helps you stay dry on the trail. This product is made with at least 50% recycled polyester fibers