Deuter Traveller 80+10
Here's what other sites are saying:
Juggling multiple bags through customs and then lugging them onto three different trains to get to your final destination could be enough to keep you at home for the rest of your life. Simplify your globe-trotting gear inside the giant, expandable Deuter Traveler 80+ 10 Backpack and preserve your wanderlust. The cushy, stable, and adjustable suspension keeps a big load (up to 60lbs) comfortable, even if you extend the main compartment to add souvenirs during your journey. Plus, with the detachable daypack, you can take light and fast excursions daily with the Traveler 80+ 10 sitting in the hostel or hotel room.