Hi @ dayleeo, super, super idea, product and hunt.
This is a clever invention that has solved the simplest (stupid) problem!
When the backpack is tied to the body, then raise it to the air with each step (without waste of energy).
With this design the backpack goes down "on the rails" without a heavy load for the backpack carrier.
In this way, the carrier can wear a backpack at much greater distances than the classic backpack.
A super-solution that uses the energy steps, for lifting backpack on .

Good luck with hunting.