Trolley bags, Travel trolley bags, Airline Luggage Fabric: Waterproof Oxford wear-resistant fabric (different materials with different patterns will be slightly different, the quality is the same)Lining: Printed polyester (thickened) Pull rod: it is made of baking paint metal tube, with strong bearing capacity and durability, Thickened ABS rubber wheel High-quality rubber wheel, small friction sound, strong elasticity, smooth surface, smooth-rolling under load. Ordinary plastic wheel, rough surface, loud friction sound, easy to wear and tear, and rolling is not smooth.syi