Fabric: fabric is engineered for cutting-edge performance and comfort, including our exclusive technology that accelerates moisture wicking for a cooler workout and helps keep the fabric fresh; Soft, lightweight, breathable, moisture wicking and quick dry to keep you active all day. ZERO slip + Pressure Release guaranteed: TUFF Arm Compression Sleeves are carefully crafted with Segmented Weave technology, with minimal exterior stitching for optimal comfort and grip. NO rub, NO slip, NO itch. The ergonomic design is knitted to not only provide comfort and protection - but expertly release pressure during strenuous exercise and activities. 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 teenagers as well as adults of all ages. Superior Cooling: The specially designed with ice silk fabric, which helps to cool your skin for 3 hours after absorbing sweat or water. It is the exact provides you with the cooling and comfortable feeling throughout the whole hot days.