Amazon.com: Carry On Backpack, Extra Large 50L Travel 。Heading to the airport with just one bag? This expandable travel backpack grows from 35L to a spacious 52L, so you pack what you need without switching luggage. Dimensions shift from 20×13×8.7 inches (regular) to 20×13×12.2 inches (expanded)—flip the expansion zippers and you\'ve got room for a week\'s worth of clothes, shoes, and gear. Five smart compartments keep everything sorted: dedicated shoe section, clothes storage, tech pocket for a 17.3-inch laptop and iPad, travel essentials organizer, and a hidden back pocket for valuables. Built from waterproof, scratch-resistant fabric that handles rain, rough baggage handlers, and daily commutes without breaking down. Padded shoulder straps and chest buckle distribute weight evenly, so your shoulders stay comfortable on long flights or weekend getaways. TSA-friendly carry-on size means zero baggage fees