My husband made some zipper pulls for my saddle bags out of paracord. I used to have a wad of cord inside the saddle bag for various repairs etc on the trail, but I had the idea of saving space and also having handy zipper pulls by doing this... They are made from paracord, two different knot styles, he said there are other ways to do it too, including using multiple colors (I like boring black). The short one is about 4' of cord, the longer one is about 6' of cord. They can easily be undone and used if needed. I have seen paracord key chains that are basically the same thing.