I'm not re-inventing the wheel here, but I just added new bungie straps to two pairs of jets (only one pair shown in pic) I picked up just before the Christmas. I used 1/4 inch bungie I had on hand and doubled up. No knots, too bulky and horrible waste of bungie in my opinion. Four zip ties make it unobtrusive and cheap. Nylon tubular webbing to keep both pieces of bungie roughly in the same place on my heel--may need to replace that with some inner tube if the nylon doesn't work out.