Fabric:Sunscreen arm sleeve 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. Breathable & Comfortable To Wear The quick dry Sunscreen arm sleeve fabric technology lets your sweat band dry in minutes. It provides customers excellent wearing experience with breathable and stretchy. The moisture wicking fabric seamless bandana makes you feel cool and comfortable, and keeps you cool in the summer and warm in winter. Durable & Easy To Clean Reusable and machine washable. Made from seamless microfiber polyester to provide lightweight durability, wrinkle resistance, stain resistance, as well as great stretch and flexibility while always retaining its shape. Cooling & UV Protection: Our UPF 50+ Arm Sleeves can block up to 98 percent of rays, which is a fantastic accessory to add to your sports gear wardrobe because they can help make your sports activities more enjoyable and free. Superior Cooling: The sunscreen arm sleeve is 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.