This is a backpack that converts into a chair. 

The clients who approached me about it knew what they wanted (chair-backpack) and had a reasonably clear vision of what the end product would be: a backpack with lots of organization that you could take for a hike; then, when you got there, you could unzip it and "take a load off" in chair mode. They wanted it to be feature-rich and emulate the style of Mystery Ranch packs. 

It took several iterations, re-designs, and testing to arrive at a great pattern. Many of the revisions focused on getting the angle of the chair just right. It really turned into a big project. The clients were extremely pleased and went on to successfully market it on Kickstarter.

https://www.kickstarter.com/projects/73196295/the-chameleon-pack-the-most-versatile-backpack-in/description