The PCX Lite Foam airline carry on size luggage case with CART is a low priced, affordable, lightweight and customizable. It has all of the external features of the patented PCX Lite Standard luggage. On the inside, we have added 4 layers of medium density gray foam 1-1/2 inches thick in the bottom, a convoluted foam sheet in the lid held in place by the elastic cross over straps and a hidden protective layer of PE sandwiched between cloth layers in the lid. This configuration allows the traveling professional to easily customize the interior to transport, protect and organize expensive delicate items. Check your excess baggage and roll your PCX to the gate. The PCX Lite Foam luggage case easily rolls "on board" and can be placed under many seats or in the overhead compartment. After the trip, the patented CART feature instantly converts to help you carry up to 100 pounds of extra suitcases or equipment cases on top.