Extremely elastic material cooling arm sleeves cooler than bare skin. Keep you feel cool in the hot summer. UPF50+ anti-ultraviolet function, which prevents harmful UVA and UVB rays, The anti-ultraviolet effect is more durable than sunscreen.It can also avoid some minor abrasions when exercising or working outdoors This practical sleeve can be worn by both men and women and its suitable as a sport sleeve as it provides excellent arm protection without restricting motion during activities like golfing, cycling or playing basketball.The non-slip elastic bands on the top and bottom to confirm the sleeves won't slip from your arms. Arm sleeves are suitable for most people's arms, without any pressure or discomfort. QTY over 8000 ship by sea.