Eagle Creek is kind of the Superman of luggage, capable of converting from one kind of bag to another — minus the phone booth. The newest innovation is the versatile Flip Switch Wheeled Backpack 22, great when you’re on a roll or hoisting the bag up and down steps. The roomy carry-on’s backpack straps and hip belt can be folded into an external zippered pocket when not needed. Or, to free up that pocket and lighten the load, the straps can be detached and stowed elsewhere. The front-panel suspension system helps with weight distribution. Considering this bag has solid wheels, sturdy rubber bumper guards, a telescoping handle, a slew of pockets, big lockable double zippers, and generously padded backpack straps and sternum belt, the 6.5-pound weight seems something of a miracle.