Knee pads are protective devices worn over the knees to prevent injury and wear and tear. They are often made of shock-absorbing materials such as foam or gel and covered with a durable outer material. Knee pads are used in a variety of activities, including sports such as volleyball and skateboarding, as well as skilled trades that require frequent kneeling. They provide comfort and safety by reducing pressure on the knees and protecting against blows, bumps and other impacts.