Made from 100% German Polycarbonate the toughest hard trolley cases on the market. Deluxe stainless steel ball bearing wheels give the ultimate durability and resist corrosion from inclement weather. Curved ergonomic designed recessed locking handle makes towing your luggage easier. Patent protected expander system provides extra capacity when you need it the most. Fully lined interior with central packing divider makes packing your case easier.