Features: 1. Copper Knee Brace: Ergonomically designed copper knee pads for arthritis pain and support with optimal compression technology for total protection. Cushioning and decompression, dispersing the pressure on the knee joint, improving blood circulation, and protecting the knee joint from injury. 2. Scientific Design: High precisions 3D cutting technology of knitting. With high-elastic tight and breathable compression fabric to 360° perfectly fit your kneecap curve. The best choice for sports protection and pain recovery. 3. Targeted Relief & Support: Research shows that copper fiber material significantly reduces inflammation, and swelling, and relieves muscle soreness. High copper fiber fabric has the effect of keeping your knee warm and reducing stiffness, reducing inflammation, and swelling. 4. Comfortable To Wear: Non-slip silicone strips and high-elastic copper fabric to avoid sliding and rolling during exercise. The air knit fabric is breathable, absorbing sweat. As thin and light as a feather, you can wear it under the leggings or pants or sleep with it, you don't even feel it. 5. Widely Used: Ideal for jobs that require frequent use of the knee, such as hiking, running, cycling, gym workouts, weightlifting, basketball, volleyball, gym, tennis, and more. Specification: Material: Nylon Color: Brown Size: Length x Fit Leg Circumference S: 25 x 30-36cm M: 26 x 36-42cm L: 27 x 42-48cm XL: 28 x 48-54cm Weight: 57g Package Included: 2 x Copper Knee Sleeves