This cooling headband has a silky smooth outer material which is perfect for imprinting and a cooling material on the inside. Simply wet with water and wring to activate. The specialized air pocket construction on the inside quickly absorbs and retains water better than standard materials. It enhances air flow and creates a prolonged cooling effect. Its also moisture wicking, drawing sweat away from your skin so you stay drier and more comfortable. Re-wet and re-wring to refresh as necessary. 100% chemical free microfiber polyester material.