UPF 50 UV PROTECTION COOLING ARM SLEEVE: The arm sleeve is made of high-quality soft fabrics (70% nylon and 30% spandex). It can block up to 99% of harmful UVA and UVB rays to prevent sunburn and skin aging. No more sunscreen. You are fully protected from UV rays all day long. Designed specifically for tattooed arms, the Beister tattoo sleeve protects your arms from UV rays as much as possible. Cooler Feeling: Extremely stretchy material makes the cooling arm sleeve cooler than bare skin, making you feel cool in the hot summer. When you wear the sleeve, the temperature will drop five degrees. Don't worry, the sun will burn you. The Beister arm sleeves are very stretchy and breathable, absorbing sweat during exercise to keep you cool and dry. Cooling effect and quick-drying. So you no longer have to worry about your arms in the summer. Closure: Elastic Classic Care instructions: Hand wash Model number: BI-AS-010-3P-J COMFORTABLE & BREATHABLE: High-performance fabric can quickly wick away sweat and dry quickly, ensuring excellent comfort and leaving your skin fresh all day long. The non-slip elastic bands at the top and bottom ensure that the sleeves do not slip off your arms. The best arm sleeves are suitable for most arms and give you the right amount of pressure without causing any unwanted reactions or discomfort.