Made my son a portage pack style backpack as a proof of concept design for larger packs. Rough finished dimensions are 14x14x4 with a capacity of 12.5 liters. Holds clothes for a weekend trip. Cinch top is made from Robic from the $10 diy kit and the body from HyperD.
1 yard Hyperd300 1” webbing 1” buckle 1” D ring 1” adjusters Drawcord, cord locks, and ROBIX fabric from $10 diy kit