Description
A full-size backpack that folds away into its own front pocket, so it lives flat in a suitcase until you need it. The case for carrying one is simple: you arrive with a checked bag you do not want to drag around a city, and a day pack you did not have to sacrifice packing space for.
Also the answer to the return-leg problem — unfold it as an extra carry-on when souvenirs have outgrown the case you came with.


