回复： Features Light weight internal memory frame. EZ GLIDE, 4 WHEEL DRIVE: The four 360 degree rotation wheels assure effortless multi-directional rolling. E-X-P-A-N-D-A-B-L-E Fully lined interior with lively contrasting color fabric. Recessed locking Trolley handle with comfort grip and Aluminum Tube. Molded corner protectors and kickplate. Self-repairing #10 zippers on main openings. Integrated ID tag. Worldwide limited 10 year warranty.