CMC Rescue Static Pro Lifeline is constructed of 100% high-tenacity polyester fiber, Static Pro Lifeline is an extremely low stretch, kernmantle rescue lifeline that provides energy absorption in the system. With less than 1% stretch at 300 lbs, Static Pro is an excellent choice for highlines, long rappels and many mechanical advantage haul systems. It's low electrical conductivity has advantages when working on towers or charged electrical equipment. The polyester fiber ropes have better resistance to acids than nylon, making Static Pro an advantage in acidic environments. The CMC Static Pro comes in solid colors with a single stripe to prevent confusion with the CMC Rescue Lifeline and other solid color kernmantel ropes.