Close Bottom Edge
Wrap the back bottom edge over the front bottom edge, and hand sew closed with heavy duty thread.
Tufting Button
Cut about a 36" long piece of tufting thread. Thread one end through the button.Run both ends of the thread through the long tufting needle.
Insert the tufting needle at the mark on the top side, pointing down as perpendicular as possible, then check the other side to make sure it's coming out at the other spot marked. Repeat as needed and don't push the needle through until you have it on the mark.Pull the needle through and pull the thread through - you need to pull quite hard to get the thread to go through.Remove the needle and adjust the thread so one end is long and the other end shorter. Run the shorter thread through the second button.
Make a Slipknot:
Run the long thread around the top of the short thread, then under, then over back over itselfThen run the thread back under and up over itself again to make a slipknot.1 - Long thread loops over the top of the short thread - at bottom of the picture
2 - Long thread loops under the short thread - top left3 - Long thread loops over itself - top right
4 - Long thread loops under itself - middle right5 - Long thread loops over itself - bottom right
6 - Pull to make the slip knot, then
7 - Pull the short and long ends together to make a tight fit - it may require fiddling with the bottom button as well as the top.
9 - Pull until it's as tight as you want then make a square knot (right over left and left over right) then trim ends.