Space Age Air Flex Frame of Copolymer Composite Material makes the trolley uprights incredibly lightweight. Main material is 1050D Magnum Strength Ballistic Nylon with Nano Coating and EVA Foam Backing on front panels. Perfect Roll wheels with stylish wheel covers for ease of movement and long lasting use. Aircraft Aluminum Trolley Handle System with One Hand Operation, an Ergonomic Hand Grip and extra long handles for easy use. Elite self-repairing number 10 zippers on mail openings with dual stitching for bonding with main fabric. Trolley Uprights expand 2.5 inches for maximum packing capacity and last minute items. TSA-approved combination locks All pieces have leather accented carrying handles and zipper tabs. Injected corner wheel guards and kick plate on all uprights. Hardware is die cast with corrosion guard for lifetime use. Easy Grip foot handle on all trolley uprights to assist in lifting product. Add-a-Bag strap with adjustable web straps that allow you to carry extra bags hands- free. Retractable Hide-a-way ID Tag.