Arm Sleeves with thumb holes with UPF 50+ protective technology which can block out over 98% of harmful UVA & UVB rays, say goodbye to sunburn & sunscreen! These compression sleeves are super light and incredibly stretchy, 90% nylon, 10% spandex blend, which allows them fit all sizes of arms for men and women. Arm Sleeves for women are ideal for hot days, breathable and feel cool for running, golfing, cycling, playing basketball, fishing, hiking, driving or gardening.