1Effectively protect the knee joint patella, professional sports protection grade silicone pad, enhance knee stability. 2The spring support bar design effectively protects the knee joint and provides strong knee support during exercise. 3Good textile technology, stitching neat, not off-line, provide effective support and protection during the movement. 4Summer kneecap, suitable for cycling, fitness, etc. 52 different colors for you to choose, meet your different needs.