Made to order in Portland, Oregon, North St. makes all sorts of bags from bike panniers and totes to duffles and backpacks. The$130 Meeting Bagis part of its Weekender Travel Series and can be used by itself or act as external expansion to itsfull-size backpack.
Constructed from tear- and abrasion-resistant Cordura with weatherproof zippers, the bag is durable and lightweight with just enough space for essentials. A pair of detachable shoulder straps stash in a back pocket so you can quickly go from briefcase to backpack.