This arm sleeve is made of 83% nylon and 17% spandex, offering good elasticity, stable compression, and a comfortable fit for extended wear. It is equipped with two 9mm EVA pads for the elbow and forearm separately, with padding thickness 40% higher than standard styles, enabling better shock absorption and impact resistance during sports. The EVA pads are arranged in an ergonomic shield-pattern layout to provide effective arm protection without restricting movement. Each sleeve is designed with two wavy silicone strips, which enhance anti-slip performance and keep the sleeve securely in place during active movements. The material is anti-allergic and gentle on the skin, reducing the risk of skin irritation during prolonged use. The fabric features breathable and moisture-wicking properties to keep the arm dry and comfortable, while also providing over 98% UV protection against harmful UVA and UVB rays. The combination of nylon and spandex delivers better stretch and support compared to conventional polyester-spandex fabrics, helping stabilize muscles and assist in post-activity muscle recovery. The sleeve is suitable for a variety of sports and outdoor activities, including football, basketball, volleyball, soccer, and biking, and is well-suited for teenagers and children. It comes in a wide range of sizes, allowing users to select the proper fit based on bicep circumference, length, and wrist measurements, and each package includes one pair of sleeves for daily use. Size: large.