This bag can be carried with any method due to the lightness of the thin polyester weavings. It has an attachable latch to hook onto a bag for easy usage at a later time. This will free up some space due to it not even taking up space in the bag. Polyester as the base ingredient also means that the bag is durable & although it is small in the folded state, when expanded, it can contains a large number of items. It is useful in scenarios where more space is needed but there are only limited space in the already carried bag. It has two zips in the unfolded bag for more storage.