The Milwaukee Non-Marring Performance Knee Pad provides maximum comfort while being the longest lasting. These professional knee pads are constructed with a pressure reducing foam that maintains its shape for extended wear. The layered gel absorbs pressure and supports the knee for ultimate comfort all day long. The Non-Marring Performance colorless cap is best suited for applications on sensitive surfaces to prevent scarring and marking. A robust， durable cap withstands changing jobsite conditions and provides the longest life.