1. PROTECTION: They can block out as of harmful UVA and UVB rays to prevent sunburn, skin aging. UV protected day long in hot weather. running, golfing, fishing, playing basketball, cycling, hiking, driving and even gardening. Can also be used as an arm cover to hide tattoos. 2. COMFORTABLE & BREATHABLE: The moisture-wicking fabric is breathable comfort, while cooling in the heat, warming in the cold. Great to keeping your hands drier when you sweat. Elastic upper cuff with anti-slip band has excellent stay-in-place performance. They help arm sleeves stay up well on your arms whatever you do. 3. SIZE FITS - Our cooling sleeves are designed for both man and woman,with high elasticity, good retention.Don’t worry to slip off your upper arm 4. Anti-slip function: compression arm sleeves adopts a transparent anti-slip design, and the anti-slip strip of the cuff is well maintained in place, which will not slip off as easily as other sleeves. Don't worry it will fall or be re-adjusted when wearing it to play golf. It can make your work or exercise more efficient 5. Wide range of uses: .It can also be used for outdoor activities or outdoor work, such as golf, running, cycling, baseball, basketball, gardening, fishing, etc.