TPRC15" Smart Under Seat Carry-On Luggage
I love this particular one by TPRC because it is roomy with a ton of compartments to fit at least a weekend's worth of clothes. It's easy to carry and store because it will fit right under the seat in front of you. Plus, the USB charging port is such a great extra to have.
Trust me, if you've ever been caught on a flight or in an airport terminal with a dying phone with no outlets in sight, you know how clutch this is! This bag literally pays for itself when you factor in baggage fees on average cost $70 per roundtrip flight.