Several styles convert to day packs, too.
This extra-large computer briefcase carries everything you need to do business and converts to a day pack, too. An all-purpose briefcase with an expandable main compartment and a ZipSlip back pocket. This Eagle Creek favorite is an all-purpose briefcase that converts to a day pack. This padded case zips wide open, giving you easy access to your computer. Stash it in a larger bag or carry it on its own.