Quality Assurance: Due to factors such as differences in leg shape and human body, size and other issues may occur. But no matter if there is any problem, or you have any dissatisfaction, please feel free to contact us, we will provide you with a satisfactory solution or a full refund!. Non-slip design: Their built-in non-slip silicone ensures that your knee pads always stay in place when you exercise, without slipping or rolling up. Powerful Protection: Knee sleeve can not only protect the knees in sports such as running, cycling, hiking, basketball, football, volleyball, golf, tennis and skiing. It can also be worn at work and when walking the dog to reduce pressure on the knees. Enjoy the joy of life!. High-quality fabric: Copper knee braces are made of 3D knitted fabrics, and copper ions are implanted in nylon through blending, so that it has better deodorization, cushioning, decompression, dispersing knee pressure, promoting blood circulation, and protecting knees from injury while stabilizing Support the knee, Moisture wicking, keep the knee warm and reduce stiffness. Note: Please check the size chart in the picture and choose the size that suits you. If you do not know how to measure please feel free to contact customer service.