Spandex,Nylon2 pairs of SPF 50 sleeves Say goodbye to burns and sunscreen Featuring the latest SPF 50 protection technology, Sun protection sleeves block over 99.8% of harmful UVA and UVB rays to give your arms complete sun protection. Get them and block out the sun once and for all when you're running, golfing, biking, fishing, or working long hours in the hot sun. No blisters or peeling skin, easier and more fun. Coolness and comfort Made of cooling fabric (85% nylon and 15% elastane), these cooling sleeves are innovative in offering a superior comfortable and breathable experience in the summer heat. By wicking away sweat and moisture, you can feel the difference when your arms stay cool all day instead of hot and sticky. Perfect for playing baseball, volleyball, basketball and soccer to keep the focus on the game. Durable and seamless To produce the sleeves, we use a 360-degree spinning technique to make them smooth and not leave annoying marks on your arms. With high-quality articulated and elaborate stitching, the fabric is reinforced and will not easily unravel or tear. One Size Fits All These protective arm sleeves are unisex and universal, with plenty of stretch to ensure they fit all male and female arm sizes. They cover your arms like a second skin without putting too much pressure but they don't fall off at all. There is no need to spend time choosing the correct size as these sleeves adapt to your own arms. Ideal for outdoor and indoor sports Sleeves are ideal for outdoor and indoor activities such as jogging, cycling, mountaineering, gardening, etc. The black and gray ones also come in handy for covering up tattoos at work.