Product UPF 50+ uv protection sleeves blocks 99.8% UVA/ UVB to protect your arms from harmful sun rays. Our arm sleeves provide an extra protection to your muscle, it is comfortable and convenient for all outdoor activities. UV Protection Ice Silk Arm Sleeves- Highly breathable material and lightweight soft fabric ensure outstanding wearing experience of our arm sleeves, keep your arm feeling cool,fast sweat drying and exercise pain release, make your skin fresh all day. Our cooling arm sleeves are conform to ergonomics,designed by considering all muscle line of body to protect muscle,promotes faster muscle recovery and blood circulation. With 360 perfect seamless sewing skill and anti-slip design, arm sleeve allow maximum freedom of movement without slipping down and won't harm your skin. Soft and breathable: made of ice silk material, which is breathable and slow in sunshine warming up, and its sweat absorbing ability is pretty good as well. Anti-UV arm sleeves: elastic arm sleeves can help to protect your arms from the cruel UV radiation in summer and prevent pulled muscle while doing outdoor activities, sports, etc. Wide applications: these arm cooling sleeves can be applied when training, racing, running, cycling, fishing, driving, golfing, jogging, climbing or having other outdoor activities.