[Top Quality Materials] : Made of brand new extra-thick ABS materials for hard shell, which make the luggage more durable, lighter and impact-resistant. Features textured finish to prevent against scratches, keeping cases beautiful after a trip. 20in is best carry on luggage for airplane (not expandable), 24 inch and 28 inch luggage (maximize your packing power), Best choice for long-term travels and business trips. [Upgrade Double Wheels] : Benefit from brand new PP and lubricating balls inside wheels, luggage moves very silent and smoothly with 360° rotate double wheels. ( A professional luggage quality test: Luggage can loads 16kg and walks 45km at a speed of 10km/h ). [Ergonomic Handles] : Adjustable & sturdy ergonomic aluminum 3-step telescoping handle allow you to maneuver in tight spaces and provide effortless movement. Smooth ups and downs for more comfortable carrying. Added 2 reinforcement brackets on the flip side of top carry handle and side carry handle to avoid hardshell cracking and 2 Soft rubbers that aim to protect your fingers when lifting heavy stuffs. [Large Space] : Unzip to reveal 2 spacious lined compartments, one with elasticated cross straps and the other with a zip divider mesh pocket and organizational pockets. [travel security] : Zippers are not easy to be pierced by sharp tools, such as pens, that protects your stuffs in luggage and privacy more better.