Gaiam Performance Dry Fit Mesh Fitness Visor is more than just a standard ball cap or baseball hat, this Dry Fit Mesh fitness visor features a built-in moisture wicking sweatband and is meant to be worn while exercising - great for weight-lifting, running and general fitness activities. Features an integrated Dry Fit Polyester Mesh moisture wicking sweatband on the inside of the hat to keep sweat off your face and out of the eyes - also protects the hat against unsightly sweat stains. Material is lightweight and breathable on the outside, and a cool dry cotton on the underside of visor bill - hat is designed to take a beating and wipes clean and washes easily. The adjustable sure-fit sizing strap will fit a head circumference of 21. 5” to 23”. Hat arrives with a pre-shaped bill optimized for full and effective coverage from the sun and outdoor elements. The under side of the bill features a cool dry cotton for extra comfort. Dimensions: Fits head circumferences of 21. 5” to 23” Materials: Main: Dry Fit 100% Polyester Mesh / Under Side of Visor: Cool Dry Cotton / Sweatband: Dry Fit 100% Polyester Mesh