【Expandable Luggage Set】:The 26-inch and 28-inch suitcases feature an 20% expandable design. The 20-inch carry-on luggage is approved by airlines,which is perfect for business and personal travel.The 13-inch carry-on bag (Meets carry-on size restrictions for those traveling domestically)ensuring easy access. 【Lightweight &High-Quality Materials】: The hard shell luggage set is made of more durable and lightweight ABS material ,it has excellent wear resistance and impact resistance. It can effectively resist various collisions and frictions during travel, ensuring your belongings are protected. 【Silent&Premium 360° Double Spinner Wheels】: Equipped with 4 high-performance silent wheels, which passed strict violent-drop test and 15kg load for 20km rolling speed test. Perfect for crowded airports or busy streets, the luggage can be flexibly passed. The well-organized interior of these suitcases with wheels ensures you have ample space for all your belongings, making travel a breeze. 【Sturdy Ergonomic Telescoping Handle】: The 3-section telescopic handle is crafted with all-aluminum materials.Combining strong、lightweight properties, corrosion resistance and rust prevention.Adjust the handle to your preferred height for comfortable pulling, and easily fold it away for compact storage. 【TSA Lock & Preminum Zipper】: Our hard-shell luggage sets are equipped with a mounted TSA lock and a fully lined interior divider with organizational pockets. When traveling, only TSA personnel can inspect your luggage without damaging the locks. This feature ensures that your belongings secure and organized. Reinforced and upgraded Preminum Zipper are not easy to be pierced by sharp tools, such as pens, that protects your stuffs in luggage and privacy more better. AAIVV 4 Piece Luggage Set Expandable ABS Travel Suitcase Set with Double Spinner Wheels, TSA Lock Hardshell Durable Traveling Bag Luggage Sets (13/20/26/28in) Gift for Back to School