Knee pads are designed to protect against impact and provide cushioning to the knees. A good knee brace effectively protects the knees. The purpose of the knee pads is to protect the kneecap while playing volleyball. Knee pads also protect the knee from scratches and burns that can occur during practice or volleyball matches. Knee Brace: A protective garment consisting of a cushion that is worn by football, baseball or hockey players. Protective clothing designed to protect the user from injury. The cushion can be made from various materials, for example, polyurethane foam, polyethylene foam, EVA foam, nylon foam, neoprene foam, polyvinyl chloride foam, polyvinyl chloride foam, extruded polystyrene foam, rubber, plastic, gel, carbon fiber and other materials.