Parachute cord (also paracord or 550 cord when referring to type-III paracord) is a lightweight nylon kernmantle rope originally used in the suspension lines of parachutes. This cord is useful for many other tasks and is now used as a general purpose utility cord by both military personnel and civilians.
Paracord 550 is the most popular cord used for bracelets, dog collars, leads, etc…. It is available is a multitude of bright colour song with he traditional military colours.
There is a lot of cheap grade cord which is full of joins, which makes the cord feel lumpy. The quality US cord from approved US contractors is smooth. The cheap grade cord outer begins to fray after a short while.