Cooling & ComfortableThis cooling arm sleeves are made of ice microfiber material (polyester 95% and spandex 5% ), which offer superior breathable and comfortable experience in the hot summer. It's character of absorbing sweat and wicking moisturequickly 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.(with laundry bag for machine wahing,hand wash is more recommended)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 teenagersas 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.