: Extremely elastic material cooling arm sleeves cooler than bare skin. Keep you feel cool in the hot summer. When you wear the sleeve, it will straight down 5 degrees. No worry be exposed to blazing sun. & : High performance fabric can fast sweat kick-away and fast dry, ensure outstanding comfort and make your skin fresh all day long. 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. : The arm sleeve is made of premium soft fabrics, 70% Nylon and 30% Spandex. It can block out as high as 97% of harmful UVA and UVB rays to prevent sunburn, skin aging. No more Sunscreen. You are maximum UV protected all day long. : The arm sleeves are designed for long, hot hours under the sun, our lightweight arm sleeves will keep you comfortable whether you're running, golfing, fishing, playing basketball, biking, hiking, driving or even gardening. Suitable for Indoor Activities too, even your workplaces. Your arms won't stick on your desk. You can be rest assured being protected all day long while doing any outdoor activity. : The cooling arm sleeves are seamless and elastic. It can offer perfect 360 fit. Our stretch fit sleeves surely can be stayed on your bicep, not make you itchy and leave imprints on your arms. V-type knitting process fits to the arm curve, helping the arm to release the pressure better.