Gaiam Classic Fitness Hat is more than just a standard ball cap or baseball hat, this fitness hat 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. Hat material is thick and durable, but also lightweight and breathable - 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. Dimensions: Fits head circumferences of 21. 5” to 23” Materials: Main: 100% Polyester, Woven / Sweatband: Dry Fit 100% Polyester Mesh