While luggage and packing cubes are certainly important to a traveler’s arsenal, we’re laser-focused on the travel backpack right now — the elusive bag that’s big enough to fit everything you might need while flying but also diminutive enough to comply with the standard size allowance of 22 inches long, 14 inches wide and 9 inches high (including wheels and handles). It’s one of our favorite pieces of carry-on luggage out there, allowing for one-bag travel.