The heat and sun during outdoors sports can make one tire out faster and speed up skin aging. Prevent that from happening with these arm sleeves which offer 99.9% UV protection. Made from a soft, elastic microfiber material which is superior to regular poly-spandex and 2 degrees cooler than bare skin. Its seamless technology gives a comfortable fit. Enables quick absorption and emission of moisture. Ideal for sports such as climbing, golf, fishing, running, hiking and cycling.