The Q36. 5 Signature Summer Cap is a cycling cap that updates the traditional cotton design with a knitted, lightweight polyester. Two polyester mesh inserts on the sides of the central panel add ventilation and a closer fit for summer rides. What Our Gearhead(R) Experts Are Saying:"On hot summer rides, the sweatband wicked perspiration away from my forehead. The polyamide stayed comfortable against my skin all ride."