Cooling Effect Unique design and material construction provides great cooling effect and makes your skin feel fresh all day. Enjoy Outdoor Activities Designed for long time necessary activities under the sun,useful in any sports conditions,such as golfing,fishing,running and cycling. 90% nylon, 10% spandex blend COOLING & UPF 50 PROTECTION - With the newest UPF 50 protection technology, cooling arm sleeves block out over 98% of harmful UVA and UVB rays and set you free from sunscreen,while the use of high-elastic fabrics allows you indoors or outdoors activities comfortable and happy. WIDE RANGE OF USES - For all outdoor sports and activities.The UV cooling sleeves will protect your skin from the sun whether you're running, golfing, playing basketball, tennis, boating, fishing, cycling,driving or even gardening ONE SIZE FITS ALL - Our cooling sleeves are designed for both man and woman,with high elasticity, good retention.Don’t worry to slip off your upper arm.For the size,if your bicep size is 8inch - 13inch, you may fell completely comfortable when wearing our arm sleeves BETTER MATERIAL THAN OTHER BRANDS - Made of cooling stretchy protofilament (90% nylon and 10% spandex).It’s cooler and protect your skin better than other brand. Allows you to do any outdoor activities,no need to use sunscreen anymore