UPF 50-Our uv sun protection arm sleeves block out over 99.8% harmful UVA & UVB rays to offer your arms maximum UV protected all day long. Perfect to block the sun when you are playing baseball & basketball,cycling, driving, running, fishing, golfing, or working in the hot sun for many hours. Get it and enjoy the sun safely COOLER THAN BARE SKIN - This performance fabric absorbnd retains sweat and water quickly, then circulates the water molecules, while regulating the rate of evaporation, breathable and dries fast, making your arms stay cooling and fresh instead of being hot and sticky. Perfect for all outdoor sportnd work. These arm sleevere easy to machine wash and hang dry. Just put the arm compression cover in the laundry bag and throw it into the washing machine, then get ready to have your new arm sleeves ONE SIZE FITLL - Our athletic sleeve is unisex and incredible durability and stretchy. Premium and soft material prevent you from being tight and cutting off the circulation of your arms, they fit all sizes of arms for men and women and all body types. 4 pairs-UV Sun Protection Arm Sleeves for Men & Women（black）