Nike AeroBill Running Cap Top off your run with the lightweight, breathable Nike AeroBill Running Cap. Its mesh lining and perforated side panels offer cool ventilation and sweat-wicking coverage. Features: - Nike AeroBill technology combines lightweight construction with sweat-wicking fabric - Reflective Swoosh design trademark is printed on the front panel - Perforated, self-adjust closure offers a snug, customizable fit - 100% Polyester