So that you can stash almost everything inside the open-format interior like a duffel bag (the provided have strap allows for carrying like a traditional duffel, way too) should you be a cost-free-wheelin, "I don't have to have no pockets" form of person. With a large 45L interior, this https://kameronnpqqv.livebloggs.com/38402545/not-known-factual-statements-about-laptop-and-backpack