Xinzechen Compression Cycling Arm Sleeve Warmers polyester Material: 86% Polyester and 14% Lycra; the breathable fabric is good for moisture absorption and sweat releasing Sun protection design : UV 50+, your body temperature will drop about 3-5 degrees centigrade Anti-slip tape on the sleeve cuff: prevent falling during exercise and reduce friction Three-needle and five-line sewing process is more suitable for intense exercise, not easy to collapse Italian ink digital printing technology with bright colors and never fade; suitable for outdoor cycling, mountain climbing, running, hiking,tennis, weightlifting, golf, baseball,basketball, skating, fishing etc