Traveler's Choice Rome 20 in. Hardside Rolling Carry-On (Green) Lightweight durable Polycarbonate ABS shell material for strength and maximum impact resistance The Polycarbonate material allows the shell to absorb impact by 'flexing' when under heavy stress The ABS is added to give the shell greater rigidity so that it will not permanently deform when under pressure, but instead 'pop' back to its original shape Internal push-button aluminum handle system Top and side carry handle for easy lifting