This luggage is constructed from 100 percent polycarbonate which makes the case extremely lightweight and durable, expands up to an additional 2 inches * The spinner wheels assure exceptional maneuverability and keep zero weight on your arm * The telescopic handle has been designed to fit in the palm of your hand, offering maximum comfort and control when pushing your luggage and less fatigue on your arm * Case expands upto 2 inches for additional packing space, fixed tsa-accepted combination lock provides a secure travel and allows only tsa agents to open and inspect your bag without damaging the lock * Limited 10-year warranty