Pack Creek Transit 22L. Black Diamond Creek Transit 22 is a modern commuter-style backpack that provides sleek and functional storage.. Built with a durable, waterproof shell fabric that offers the rugged toughness of the haul bags, the Creek Transit sports a zippered top lid with internal pocket storage, as well as an exterior-access laptop sleeve that secures a 13-inch computer. Padded shoulder straps and back panel offer a comfortable carry whether you’re on two feet or two wheels, and haul-loop handles on the top are easy to grab.