NikeCourt Featherlight Rafael Nadal Premier Men's, White, Size ONE SIZE. Comfort on the court: The NikeCourt Featherlight Rafael Nadal Premier Adjustable Tennis Hat provides strategic ventilation and cooling for minimal distractions during play and total comfort in the stands. Benefits: Dri-FIT technology to help keep you dry and comfortable, Six-panel design with durable interior taping, Laser-perforated vents for breathability, Reflective strap at the back for visibility and an adjustable fit, Product details: Fabric: Body bill vents: Dri-FIT 100% polyester. Sweatband: Dri-FIT 91% polyester 9% elastane. Hand wash.