the db hugger 30l is a smart and spacious travel backpack - approved as carry-on luggage. the hugger 30l from db combines everything and more that you expect from an optimal travel backpack. this backpack is allowed as carry-on luggage and will follow you from the airport to the mountain peaks of the himalayas.the combination of handiness and spacious inserts make this travel bag an absolute must for those who like to travel the world. strong but light abs ribs ensure that traditional padding can be removed. so this backpack is super light and protects your belongings.a spacious pocket at the top of the backpack lets you quickly access important small items. it also offers safe and easy access to the separate padded 15 laptop compartment.the hook-up system lets you strap this backpack to any db's roll-up bags.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.