smart and spacious backpack. the ramverk 21l backpack by db combines everything you expect from an optimal backpack. the separate, padded laptop compartment holds up to 16 laptops and is equipped with access to help you get through airport security. this backpack is approved as carry-on luggage and will follow you from the airport to the mountain peaks of the himalayas.rib cage constructionâ„¢inspired by the human rib cage, which protects the body's most valuable organs, db's patented rib cage constructionâ„¢ protects your gear in the bag. the rib cage construction is built from strong, lightweight abs ribs formed as a triple-fold structure. this means that conventional padding can be dispensed with. this makes the bag lighter and yet protected all around.