don't be lazy....
Don't be lazy like myself and assume that your closing loop is going to break when you are packing your rig and you can just replace it then. Today I found myself 3 hours away from civilization, geared up for a wingsuit jump, and when I bent over to pick up my helmet I felt an un-nerving "pop". I new immediately what it was and managed to make another closing loop out of a piece of a pull up cord.
The morale of the story is replace your closing loops BEFORE they break. This could have happened while climbing an antenna, during an aerial, or many other much worse situations.....