Cooling & Upf 50 Protection With the newest UPF 50 protection technology, cooling arm sleeves block out over 98% of harmful UVA and UVB rays and set you free from sunscreen,while the use of high-elastic fabrics allows you indoors or outdoors activities comfortable and happy. ZERO slip + Pressure Release guaranteed Arm Compression Sleeves are carefully crafted with Segmented Weave technology, with minimal exterior stitching for optimal comfort and grip.NO rub, NO slip, NO itch.The ergonomic design is knitted to not only provide comfort and protection - but expertly release pressure during strenuous exercise and activities. Foldable & Practical With portable and lightweight design, you can easily roll Arm sleeve into a compact size, which is very convenient to put it into any purse, backpack or handbag.Sunscreen arm sleeve are the best choice for regular daily use and outdoor sports activities, such as fishing, climbing, hiking, gardening, camping, traveling, boating, hunting, beach, park, golf, tennis, safari,etc. 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.