A built in set of wheels is a new and unique feature not found in other bags; just load, tilt, and you are ready to go. Bag can be rolled across floors, eliminating the need to carry it over long distances. Wheel set is compact, allowing for easy loading into cars. Made from heavy-duty nylon; padded for extra protection; includes exterior pocket for accessories. Carrying straps, including over the shoulder, for easy transportation over rough surfaces and up stairs.