Hartmann 7R Global Carry On Spinner, Aluminum, One Size Curve material layers of woven polypropylene are formed into self reinforced composite sheets providing superior durability while being extremely lightweight Spinner wheels four wheels zero effort, four multidirectional spinner wheels allow 360 degree upright rolling in multiple directions so there is no weight on your arm Retractable handle provides easy maneuverability when extended out from the case, and stores neatly inside when not in use. Recessed TSA combilock for secure travel Top leather handle is more comfortable and durable way for you to lift the case with ease, to carry it by hand when rolling isn't an option 21.6x15.7x9.05