When intensity peaks and the temperature spikes, the fast drying, breathable XA Cap helps you keep your cool. It's light, it has added venting on top, and keeps the sun off your eyes. Lightweight fabric, added vent holes on top and complete protection from the sun make this cap indispensable for intense mountain pursuits. Featherweight fabric, soft comfortable feel. Added holes on the top of this cap act like tiny chimneys for letting heat escape. Material: Polyester.