The Blok Medium is like a functional chameleon. Starting at 30L and expanding to 32L, it can be used as an everyday backpack or for a short trip as hand luggage. If you want to carry the backpack as a travel bag, you can easily store away the shoulder straps and carry it as a duffle bag. The pull cords allow you to access the backpack from the top to quickly grab your stuff. On an impromptu shopping trip, you can even fit in a six pack of water from the top.