Sun UV Protection: These arm sleeves feature advanced UPF 50+ technology, blocking over 98% of harmful UVA and UVB rays for comprehensive sun protection. Cooling & Comfortable: Made from high-quality microfiber fabric (90% polyester, 10% spandex), these arm sleeves offer excellent breathability and comfort during hot weather. The fabric absorbs sweat and wicks away moisture, helping keep arms cool and dry. Seamless & Durable: Designed with precision, these compression arm sleeves are constructed from reinforced material that resists fraying or tearing, even after repeated washing. Fine stitching enhances long-term durability. One Size Fits Most: Measuring 15 inches in length and stretching up to 47 inches, with an upper arm circumference that stretches from 3.7 inches to 8 inches, these sleeves provide a snug, flexible fit suitable for most men, women, teenagers, and adults. Wide Application: Ideal for outdoor activities and sports such as running, golf, cycling, fishing, gardening, football, basketball, tennis, and more. The black design also works well for covering tattoos. Help protect your skin while staying active.