Samsonite Dura-lite Hardside 20" Carry On Hardside Wheeled Luggage Hardside (ABS) - Luggage is made from a vacuum-formed or pressure-formed shell. Strong ABS plastic, a temperature-resistant, highly impact-resistant material, is combined with a textured finish for the classic hardside look. Carry On Sized - Luggage designed to fit in most airlines overhead compartments; may not conform to some airlines carry-on standards. Inline skate wheels - Are constructed of polyurethane with ball bearings to minimize frictional resistance, offer durability and reduced resistance for smooth rolling. Push button handle - Locks when fully extended so you can push or pull your case. The handle also locks when fully recessed, greatly reducing the risk of damage when not in use. Top carry handle - Allows you to lift the case with ease and comfort, or carry it by hand when rolling isn't an option.