Airline-Approved Expandable Design:22x14x9 carry on luggage meets strict airline approved carry on luggage standards. Expandable zipper adds 20% more space while keeping this carry on luggage with wheels overhead-bin ready. Military-Grade Hard Shell:Ultra-light hard shell carry on luggage protects valuables. Hardside carry on luggage exterior resists impacts better than softsides. This hard case carry on luggage survives rough baggage handlers. Silent 360°Wheel System:4 spinner wheels deliver smooth control on this small rolling suitcase. Suitcases with wheels carry on size maneuverability makes airport sprints effortless. Zero noise on tile/carpet. TSA Lock & Travel Security:TSA approved carry on luggage with inspection-proof locks. Travel luggage with wheels includes theft-deterrent zippers. Secure essentials in this carry on hard shell luggage with wheels. Optimized Capacity+Expansion:20 inch carry on luggage fits 5-day trips. Expansion zipper boosts capacity 20% for souvenirs. Rolling luggage with ergonomic handle completes this travel carry on suitcase.