I was eyeballing the stuff sack that my Etowah tarp came in and admired the brilliantly simple design so I reverse engineered it to make my own stuff sacks. I documented my latest sack to serve as a mini tutorial. Please forgive my poor sewing ability - I'm still learning. Firstly I started with a scrap piece of canvas from a GI shelter half that I recently made a haversack from. To get the right size piece of material simply double the desired width and add about 1/2 inch and add about 1 inch to the desired height. Here is my piece roughly cut: The real genius in this design is that it does not require any grommets or fancy sewing; the finished and reinforced edges are all achieved with two simple folds. Here I must give thanks to my wife for showing me how to do this part easily. I guess I'll keep her. Note that the entire sack is sewn inside out so that the "raw" edges will be inside when done. First I fold the upper corners in - the size of the triangle from top to bottom should be double the desired height of the channel that your cinch cord will run through. Close up of one side: Next I fold the top down to form the cord channel. For stiffer material one will probably want to place the cord in the channel before sewing it down but for lightweight stuff I have been able to easily get the cord through after sewing the channel. Close up of one side: Next I fold the entire thing in half and sew the bottom and side together. Lastly I turn the whole sack inside out and install a cordloc (one could just as easily use a simple tie string for a more "traditional" look). Close up of the inside of the cord channel of the finished bag: An ultralight stuff sack I made using this pattern with parachute material: The design could be improved by adding a round bottom for larger bags.