One size fits most (57.5cm) Polyester 100% Prolight from New Era is 25% lighter than a cap made from traditional performance fabrics COOLERA wicks away moistures and disperses it quickly SOLARERA provides UPF 50+ sun protection New Era's Cooling Sweatband keeps the wearer more comfortable in heated conditions, sweatband had been engineered to wick and disperse moisture from the wearer while cooling Adjustable Velcro closure PXG logos on front, sides and back