mail ordered shoes online.
they came wrapped in these sealed roughly 16 oz volume air bags.
It said re-usable packaging, but keep away from children.
I remember reading the UL propaganda about ziplock bags in a stuff sac for MYOG pillow.
These thin plastic shipping airbags don't even register on the weight scale. I was thinking of packing them as-in, inflated, then at night time, wrap them in a t-shirt, or in the top compartment of the backpack bag.