Breathable comfort during playThe Nike Feather Light Tennis Hat is made with mesh vents and sweat-wicking fabric for minimal distractions on the court, with a black underbill for reduced glare. BenefitsDri-Fit fabric to wick away sweat and help keep you dry and comfortable. Mesh panels for optimal breathability. Black underbill and binding minimize visual glare. Adjustable back closure for a customized fit. Fabric: Body/bill: Dri-FIT 100% polyester woven. Sweatband: Dri-FIT 90% polyester/10% spandex. Care: Hand wash. Approximate measurements: Circumference: 23 in Brim: 2 3?4 in