As we know, the knee has a little protection on its own which is provided only by thin layer of skin and muscle over kneecaps. If you fall on your knees when they are bent, there is not much cushion which could keep you from pushing the patella bone out of space or breaking it, often tearing muscles or ligaments in this process. Usage of knee pads during certain sports can help to reduce the chance of knees injuries. Knee pads are used for knee protection in order to avoid different knee injuries such as bruises and abrasions which usually are caused by direct blows or other impacts. Knee pads usually have cushioning on the area of kneecaps to absorb the shock of blows and to protect patella. Knee pads are commonly used in volleyball, basketball, football, hockey, wrestling and other contact sports. These sports are known as sports where athletes often are falling to the ground, collide with other players or get blows of balls. Knee pads are the most used knee protectors in extreme sports such as motocross, BMX, skateboard and other extreme sports which are related with high risk of impacts and thus injuries.