Construction Plan

I plan to create a bike bag that is 14" long, with a square(ish) cross section that is 6"x6". 

I created a prototype in order to test how well the duffle enclosure would work. This also allowed me to get an idea of what the pattern would look like (see pictures below). When making this bag, I plan to make two layers, with the seam sides of each facing each other. This will prevent any sewn edges from being seen on the inside of the bag. Also, this will allow me to place a stiff piece of wood or plastic yard sign (used in many diy bike bags) in between the bottom layers of the bag to make it hold its shape.