For a convertible bag + backpack, I have a Qwstion bag: http://www.qwstion.com http://www.qwstion.com For a more ergonomic backpack when I have to walk more an

For a convertible bag + backpack, I have a Qwstion bag: http://www.qwstion.com http://www.qwstion.com For a more ergonomic backpack when I have to walk more and carry a lot, I use a booq backpack (booq boa because I wanted it to have hip belts).