I really love the concept of these expandable bags. The bags zip/fold to a small size and can be expanded through unzipping and expanding the bag. The fabric is pretty decent but the board base where the wheels are attached are sub-par.I needed to carry some car parts which where in boxes on a flight overseas. These where headlights so where not heavy. The bag easily accommodated the boxes. However, by the time I reached my destination the base board had ripped. Fo..