Our 550 Type III paracord is a commercial grade version of Mil-Spec parachute cord: a 100% nylon kernmantle rope made of seven inner double-twisted strands and a 32-strand woven outer sheath with minimum break strength of 550 lbs. This 550 cord also features Glow-in-the-Dark threads woven into the outer sheath, which when charged up in a lighted environment will provide a glow or light in dark conditions! It is a perfect edition to any emergency survival kit.