I use a homemade silnylon stuff sack as my bear bag. It has the standard square-shaped bottom.
I would like to make a slightly larger bag and I have two questions about design.
1. Would the the sack be stronger if instead of the standard square-shaped bottom I just sewed it like a pillow case? I think MLD uses this design on their bear bag.
2. Does adding a second seam add significant strength to the design of the sack?

