I made it with a continuous 8 feet length of 550 paracord. If needed in an emergency, it can be cut and taken apart and you have 8 ft. of strong cord. I made this first one for hubby. It's probably a guy thing since I think guys mostly make them and wear them (but, usually not with a button), but I think they're pretty cool. The cobra knot wasn't quite as easy to master as I thought it would be. :oP The reverse side of the bracelet looks exactly like the top which also is pretty cool.
