A paracord bracelet is a woven bracelet made from lightweight nylon rope, often called "550 cord" due to its 550-pound tensile strength. It is a popular survival tool because it can be quickly unraveled to provide a long, strong cord for various emergency uses like building shelters, setting traps, or repairing gear. While functional, these bracelets can also be worn as fashion accessories and come in many styles and colors.