NIKE Men`s 6 Panel Tailwind Training Cap Dri-FIT fabric helps keep you dry and comfortable Mesh panels and interior perforated panel provide optimal breathability Hook-and-loop back closure with reflective pull tab offers a personalized fit and greater visibility Fabric: Body/bill: Dri-FIT 100% polyester. Sweatband: Dri-FIT 100% recycled polyester/9% spandex. Grey underbill reduces glare