"SUN-BLOCKING AND SWEAT-WICKING The Nike Dri-FIT UV Solar Golf Arm Sleeve is designed to protect exposed skin from harmful UVA and UVB rays. It features a stretch fit and sweat-wicking fabric for comfort that lasts through the final hole.UVA and UVB protection from the sun in areas covered by the sleeveDri-FIT fabric to help keep you dry and comfortable Stretch opening at upper arm with no-slip taping for a snug, unrestricted fitLightweight carrying case with zip closure and mesh at back for secure, breathable storageFlat seams move comfortably against your skin ・One pair ・Fabric: Sleeves: Dri-FIT UV 84% polyester/16% spandex. Bag: 100% polyester. ・Machine wash"