Kneepad is an object used to protect people's knees. It has the function of sports protection, cold protection, and joint curing. Divided into sports kneecap, health kneecap. Suitable for athletes, the elderly, knee disease patients. In modern sports, the use of knee pads is very widespread. The knee is not only an extremely important part of the movement, but also a relatively fragile and vulnerable to injury, or an injury is extremely painful and recovery is slow, even some people will appear rain cloudy days on the dull pain.