A knee pad is a protective accessory designed to cushion and support the knee joint during various activities. They are commonly used in sports, construction, and other physical tasks where the knees may experience impact or strain. Knee pads can be made from materials like foam, gel, or hard plastic, providing varying levels of protection and comfort. These pads are often adjustable and can be worn over or under clothing. They help prevent injuries such as bruises or scrapes and can also alleviate discomfort for individuals with conditions like arthritis. Knee pads are essential for athletes, construction workers, and anyone engaging in activities that put stress on the knees.