Material The sleeve is made of premium soft fabrics, 90% cotton, 10% spandex. It can block up to 97% of harmful UVA and UVB rays to prevent sunburn and skin aging. Cooling arm sleeves made of extremely elastic material, cooler than bare skin. When you wear the sleeve, you are protected to the maximum from UV rays all day long and keep you cool in the hot summer. One size fits all These protective arm sleeves are unisex and universal with plenty of stretch to ensure they fit all arm sizes for men and women. They just cover your arms like a second skin without too much pressure but do not slip down a bit. No need to struggle to choose the right size as these sleeves fit your arms themselves. Seamless and Durable We use 360 degree seamless weaving technique to make these UV arm sleeves so they are smooth to wear and will not leave annoying imprints on your arms. With elaborate sewing and high-quality articulated seams, the fabric is reinforced and does not fray or tear easily. Color (gray, white, light blue, black) A set of 4 colors, you can freely match your mood and clothes, so that you have a good mood every day. Widely Used The arm sleeves are designed for long hot hours under the sun, our lightweight arm sleeves will keep you comfortable whether you are running, golfing, fishing, playing basketball, cycling, hiking, driving or even gardening. Also suitable for indoor activities, even your workplaces. Your arms will not stick to your desk. Number of pieces delivered: 4 pairs