Taking one front and one back fringe-piece, tie them together. Go down the line and tie each, but make sure they are only single ties, because we will need them as long as possible. In groups of three, take the middle knot and, with the fringe, tie them to the left and right knots. Repeat this pattern down the line until the last set. This should help seal up any holes that would allow stuff to fall out of the bag.