This cooling arm sleeves provide a seamless, snug fit, thanks to the durable blend of 90% nylon and 10% spandex. Forget about constant adjustments or circulation issues. Sun-Blocking Superstar: offer UPF 50+ protection, blocking over 98% of harmful UVA & UVB rays. Perfect for outdoor activities, they are the ultimate heat-beating UV sleeves for men and women. Sweat-Powered Cooling: made with sweat-wicking fabric that cools you down as you heat up. They make ideal basketball shooter sleeves and football arm sleeves, keeping you fresh and comfortable even in extreme heat. Tattoo Coverage: cover up tattoos while keeping you professional and cool, thanks to the super stretchy, sweat-wicking nylon-spandex blend. They are the driving sleeves for sun protection that anyone with tattoos can appreciate.