Space and style come together in the Sympatico International 21” Carry-On Expandable Spinner, one of our best hard shell carry-on luggage solutions. Our exclusive expansion-compression system creates packing space unparalleled in a hard-sided carry-on, then compresses back to fit most international airline overhead bins. Sail smoothly through the airport with ball-bearing spinner wheels and an easy-to-use TSA-approved lock, and trust its light-but-strong polycarbonate construction for decades of dependability.