Description: This product can only resist 20KG with knee pads, which can effectively reduce the pressure on the knees. Adjustable length, easy to disassemble special manufacturing spring, strong rebound force When you pick up, your knee strength can be increased by 40KG Both pants can be worn inside and outside, and the length can be adjusted. Breathable non-slip fabric with venting holes; suitable for climbing stairs, climbing, sports, etc. With the booster, when the knee is folded, there will be a certain angle to start the elastic force. The principle is that the knee joint is not flexible when starting from 0 degrees.