ABS Hard Shell: The material has excellent wear resistance and impact resistance, and is lightweight. Durable luggage can withstand transportation and keep your belongings safe. Lightweight luggage makes traveling effortless and enjoyable. TSA Approved Lock: Each travel luggage comes with 3-dial TSA approved combination lock to better protects your property and facilitate customs clearance. Universal Wheels: Upgraded spinner wheels are quiet and easy to move, making it easy to navigate through airport halls and streets. Telescopic Handle: 3-level adjustable handle to meet the needs of users of different heights. 20-inch carry-on luggage size: 13.6 x 8.3 x 21.5". Ideal for weekend trips. Organized Interior: Fully lined interior with a zippered divider and cross straps keeps your belongings neatly in place. Comes with 2 packing cubes for easy separation of items. HOW TO RESET THE TSA APPROVED LOCK