lightweight backpack with rib-cage constructionâ„¢, specifically designed for the female anatomy. designed with the female anatomy in mind, the db feya 16l backpack features ergonomic shoulder straps and a fitted back panel for comfort.stowable hooks keep the design minimal. inside, you'll find organisational compartments and small pockets. this pack features db's durable rib-cage constructionâ„¢ and opens completely to give you more visibility.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.