We haven't seen a briefcase at the Patagonia headquarters since we began making these bags. Designed for transporting the unruly trappings of work and play, each has a roomy main compartment covered by an oversized flap and a padded shoulder pad. Our bike-friendly Critical and Half-Mass Bags have an adjustable T-strap, reflective trim and a loop for your bike taillight. The paper/computer friendly Vertical Mass contains a padded compartment for a laptop, side pockets for water bottle and cell phone, a zippered inside pocket and an outer pocket. All bags are made from tough, coated 1 ,680-denier Ballistics nylon and lined with nylon pack cloth for water resistance. Imported.Volume: 750 cu. in. (12.3 liters)