RRC Pink Solid Color Compression Arm Sleeve- 1 Pair Thumb holes for warmth and secure fit means no frequent sliding and curling, seamless construction, ultimate uv block 99.8% protection, contoured rib for improved fit. Material : aqua x (92% nylon, 8% spandex) / high performance fabric: fast sweat kick-away & fast dry / special moisture-radiating material. Best for cycling, running, jogging, hiking, basketball, baseball, tennis, golf, football, driving, fishing, climbing, indoor workplaces(you arms won't sticky on your desk). Size : these compression arm sleeves are perfectly sized for men and women - unisex & one size- extremely elastic material.