Product Features: Material: 88% polyamide + 12% spandex arm cover has a cool touch feeling and sweat absorbent and quick drying function for amazing cooling! Arm sleeves provide breathability and comfort. The sunscreen cover has high UV protection rates and protects against harmful UV rays. The arm guard is soft and smooth with no discomfort on your skin. The arm cover is made of spandex material with excellent elasticity, so it fits well. The cool arm cover fits the body and moves with you to help reduce muscle sway during exercise. The anti-slip treatment prevents slippage and reduces stress when worn. It dries very quickly, so it will shorten drying time after washing. Sports arm covers are perfect for all kinds of sports, including cycling, fishing, climbing, marathons, golf, outdoor activities, driving, watching sports, camping, etc. Size Guide: XS/S Size: Upper arm approx. 7.9 - 10.2 inches (20 - 26 cm), M/L size: Upper arm approx. 10.6 - 11.8 inches (27 - 30 cm), XL/XXL size: Upper arm approx. 12.2 - 13.8 inches (31 - 35 cm).