1.NOTE: Please check the size chart in the picture to choose the right size for you, the right size will make you more comfortable to wear. This product contains a small amount of latex, if you are allergic to latex/rubber, please do not use it. 2.PREMIUM QUALITY FABRIC: Copper knee braces are made of 3D knitted fabric, with copper ions implanted into the nylon through blending, which gives it better cushioning, decompression, dispersion of knee pressure, promotion of blood circulation, and protection of the knee from injury, and at the same time, stabilizes the support of the knee, absorbs moisture and perspiration, keeps the knee warm, and reduces the stiffness of the knee. 3.TOP PROTECTION: The knee sleeve not only protects your knees during running, biking, hiking, basketball, soccer, volleyball, golf, tennis and skiing. It can also be worn at work and while walking the dog to take the pressure off your knees. Enjoy the fun of life! 4.ANTI-SLIP DESIGN: Built-in anti-slip silicone ensures that the knee brace will always stay in place during exercise and will not slip or roll up.