Castelli Free Cycling Cap Constructed from cotton twill, the Castelli Free Cycling Cap can be worn comfortably under a helmet to protect your face and top of the head from the brutal sun, while also catching sweat and wicking it away before its sting daggers your eyes. With a classic 4-panel design and screened Castelli graphics, the Free Cycling Cap is entitled to frequent bagel shop visits. Features: Cotton twill Classic 4-panel construction Weight: 41 grams Temperature Rating: 10deg-25degC / 50-77degF