Very clever bag to carry your stuff......and your bike!
Use normally as a ruck sack, when off the bike unzip the bag around to edges and it unfolds into a bag large enough to contain a folded Birdy. The bag can then be carried either by a carry handle or shoulder strap. Access to all your items in the rucksack section of the bag can still be gained via a side pocket, and the rucksack straps pack neatly away to keep everything tidy.