Features: 1. Copper Knee Brace: Ergonomically designed knee pads for arthritis pain relief and support with optimal compression technology for total protection. Provides cushioning and decompression, helps disperse pressure on the knee joint, improves blood circulation, and protects the knee joint from injury. 2. Scientific Design: High-precision 3D knitting technology with high-elastic, breathable compression fabric that fits 360° around the kneecap curve. Suitable for sports protection and pain recovery. 3. Targeted Relief & Support: Designed with copper-infused fabric that helps reduce inflammation and swelling, and relieve muscle soreness. The fabric helps retain warmth, reduce stiffness, and provide soothing support. 4. Comfortable To Wear: Features non-slip silicone strips and high-elastic fabric to prevent sliding and rolling during activity. Breathable air-knit fabric wicks away moisture. Thin and lightweight design can be worn under clothing or during sleep without discomfort. 5. Widely Used: Ideal for activities that require frequent knee use, such as hiking, running, cycling, gym workouts, weightlifting, basketball, volleyball, and tennis. 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