MAIBU 4 Pairs Outdoor UV Protection Arm Sleeves Cooling Hand Cover MATERIAL: polyester + spandex + nylon + ice silk(new antibacterial material) UFP50+ provides 99% UV protection for your arms from Aging, Sun-burn more than Arm-Cooling Skin temperature down 3-5 degrees Celsius. cooler than Bare Skin; fast sweat kick-away & fast dry Seamless construction: three- dimensional (3D) weaving design to make more comfortable than others; thumb holes for warmth and secure fit means no frequent sliding and curling Occasions: Cycling, Running, Jogging, Hiking, Basketball, Baseball, Tennis, Golf, Football, Driving, Fishing, Climbing, Indoor workplaces(You arms won't sticky on your desk) etc