The Buff 5 panel Go Cap is made for everyone looking for an efficient sun protection when running in good weather conditions. The run cap offers all the basic features and a variety of styles to choose, in sports style. Comfortable fit, fit for everyday use. UPF 50 certified sun protection against ultraviolet (UV) radiation produced by the sun. Samples of fabrics tested for UV protection in accordance with the international standards. Designed to wick away moisture in an efficient and fast way. Ideal for high intensity activities. Designed to provide a perfect adjustment for every size. Prevents overheating and improves comfort by transferring moisture vapor away from the body through the fabric. Size and Fit S/M: 53 - 57 cm L/XL: 57 - 61 cm Materials Main fabric: 96% Polyester, 4% Elastane   Sweatband: 100% Polyester