The average carry-on suitcase is around 40L, so by calling this one "The Weekender" at 80L, we are giving you plenty of room to bring everything you need to have a really large time. These waterproof bags are made with rugged 1680D ballistic Nylon combined with military-grade Nylon webbing and TIZIP® water / air-tight zippers. Waterproof. Airtight. Dust-Free. And for good measure, we added removable back pack straps to make it easier to run through the airport to catch your connecting flight. Each bag contains a water-resistant zippered pocket for valuables inside the main compartment, and the oversized zipper construction creates an extremely large opening for easy access to your gear. The 80 L has 4,880 cubic inches of storage capacity.