Cooling & UPF 50 Protection: With innovative cooling technology & UPF 50 protection to block out over 99.8% of harmful UVA & UVB rays, the RIMENCH Cooling Sun Sleeves are more than your average Sun sleeves. Made with breathable elastic and moisture-wicking polyester fabric, form-fitting, anti-slid and lightweight.Use Multipurpose: Applicable Scenarios Sports And Fitness Versatility-Men, Women Or Children Can Use Fitness Arm Sleeves For Sports, Football, Basketball, Golf, Tennis, Cycling, Bowling, Baseball, Etc. Which helps protect the arm from bruising and helps for improving arm circulation while supporting surrounding muscles.Trusted Satisfaction: RIMENCH Arm Sleeves designed to minimize the risk of injury especially during the strenuous activities, and protection against harmful UV. Expect ultimate comfort and protection wherever adventure takes you.Arm Sleeves Size: 17.0 x 5.5 inch (length x width). Suitable for most people's arms, without any pressure or discomfort. Designed by considering all muscle line of body to protect muscle. Make your muscle feel comfortable when doing sport.High Quality Material: This arm sleeves are made of 92% Polyester, 8% Spandex, which can give you cool feeling in hot weather, and the material is soft, elastic, more skin friendly, not easy to slip off, and has good flexibility and good moisture absorption ability.