I wondered if those brown paper grocery bags could be made into backpacks, so I made some and learned that even very strong paper tears under back pack conditions. So I searched for and found strong composite “papers” that I could not tear. I made some backpacks of them, but even they would tear at the points where I sewed on the straps.
The sewing holes just weakened the paper and I realized that no part of a “paper” backpack could be sewn. The straps in particular had to be attached without sewing, and gluing wasn’t reliable enough. So I designed, and patented, a special clip that creates a strong and secure strap that does not jeopardize the integrity of the bag. The final product is a bag that looks like a basic brown paper bag but performs much better than typical non-reinforced sewn backpacks. Unless you have seen a Volks-bagen in person, you will not believe how strong it is. I made this video to prove it:
Strange Volks-bagen Theater Presents: "Bricks" from volksbagen on Vimeo.