by Leo Jakobson | April 30, 2013
The CalPak Diplomat 21-inch Rolling Backpack by Earth Gear is actually comprised of two pieces of luggage in one — a larger bag to get you where you’re going, and a smaller one to use while you're there.

The main bag measures 21 inches by 15 inches by nine inches in volume, and features a padded laptop compartment, a padded top handle, a single-pole retractable handle, and inline skate ball-bearing wheels, as well as padded back straps. 

It also has a smaller, detachable backpack that zips to the front of the bag that can be used as a daypack. The daypack measures 17.5 inches by 13 inches by six inches in volume, and has full, padded straps and its own padded top handle.

The bag retails for $94.