Knee protection is an important part of safety for many activities, and there are two main solutions: pads and braces. Pads, which are three letters long, are typically made of foam or other cushioning material and are designed to absorb shock and reduce impact on the knee joint. Braces, which are five letters long, are typically made of metal or plastic and are designed to provide stability and support to the knee joint. Both pads and braces can be used to protect the knee from injury during physical activity.