Unique Bargains - Travel Carry on Backpack, 18.9" Flight Approved, Expandable Weekender, Waterproof USB A/C, 18" Suitcase - Black

This backpack expands from 33L (18.9"x13.8"x7.9" ) to 42L (18.9"x13.8"x9.8"), offering ample space comparable to an 18-inch suitcase. Its dimensions meet most airline carry-on requirements, fitting easily in overhead bins or as a personal item