Folding in and out of a zipped pouch like a foldable tote, Stubble & Co. presents its folding backpack. The 20L design features a main compartment, external pockets for water bottles, and a front ...
I recently ran into that problem myself, but the person at the airport check-in counter who gave me some trouble about my bag just seemed to care about my roller carry-on. So I'd suggest using these ...