Fabric:Sunscreen arm sleeve fabric is engineered for cutting-edge performance and comfort, including our exclusive technology that accelerates moisture wicking for a cooler workout and helps keep the fabric fresh Soft, lightweight, breathable, moisture wicking and quick dry to keep you active all day. Cooling & UV Protection: Our UPF 50+ Arm Sleeves can block up to 98 percent of rays, which is a fantastic accessory to add to your sports gear wardrobe because they can help make your sports activities more enjoyable and free. Suitable for all Sports: Specially designed for outdoor activities, our lightweight arm sleeves keep you comfortable whether you're playing basketball, golf, angling, cycling, climbing, hiking, etc. Soft and Comfortable Fabric: Ensuring its performance in blocking up to 98 percent of rays, we also make our arm sleeves lightweight, breathable and sweat-wicking.These sleeves not only protect you from the sun, additionally, but they also help keep you cool in the noonday sun. Seamless & DurableThe compression arm sleeves with a delicate fabric material and fine sewing skills. The fabric is reinforced and won't unravel or tear easily even washed for long times. (with laundry bag for machine wahing,hand wash is more recommended) 100% Guarantee Satisfaction We are confident in our products and please feel free to contact us if you're unhappy with your purchase. We offer 100% money back guarantee if are not happy with the item.