With 55+ liters of capacity plus a buckle-on daypack, the Deuter Quantum 55+10 SL Travel Backpack is huge, but then so is this adventure you're about to embark on. Designed as an all-around international travel and trek pack, the Quantum has a super comfy adjustable carry system and a slim shape that won't get stuck in narrow doorways or train hallways even when it is full. You have a bottom compartment for a sleeping bag and a dual access main compartment. The height-adjustable top lid allows the top of the pack to hold 10 more liters of stuff and the clip-on day pack expands for extra long days exploring a new city. Innovative German design in a sleek, no-nonsense modern package, this Deuter Travel pack is ready for a trip around the world.