Sun UV ProtectionSun protection arm sleeves with the newest UPF 50+ protective technology for effective UV protection,whick can block out over 98% of harmful UVA & UVB rays to offer your arms an all-around UV protection.Say goodbye to sunburn & sunscreen Cooling & ComfortableThis cooling arm sleeves are made of ice microfiber material (polyester 90% and spandex 10% ), which offer superior breathable and comfortable experience in the hot summer. It"s character of absorbing sweat and wicking moisture quickly keeps your arms refreshing all day instead of being hot and sticky. Seamless & DurableThe compression arm sleeves with a delicate fabric material and fine sewing skills.The fabric is reinforced and won"t unravel or tear easily even washed for long times. One Size Fits MostThe natural length of men & women arm sleeve is 15 inch and max stretches to 47 inch. the upper arm circumference is 3.7", max stretches to 8 inch.They are durable and stretchy, great fit for all shapes and sizes and teenagers as well as adults of all ages. Wide ApplicationIdeal for all sports & outdoor activities. Great skin protection when running, golfing, driving, cycling, fishing, jogging, gardening, football, basketball, tennis and so on. Also the black color great for tattoo cover-up .