Osprey Farpoint 55
Here's what other sites are saying:
Wanderlust can strike at any moment, and with the Osprey Farpoint 55 Pack, you'll be ready to head out in a hurry. This 2-in-1 backpack includes a panel-loading main bag as well as a detachable day pack for quick trips when you reach your destination. It also includes clips that attach it to the suspension of the main pack, so you can wear it kangaroo-style to keep valuables like your passport and wallet in view during rides on packed subways or walks on crowded streets in exotic locations.
The Osprey Farpoint 55 travel pack is built to take you to the far points of the globe, with the comfort of a long-haul pack and savvy convenience of a streamlined traveler.