We found this fantastic line of luggage from A. Saks--not cheap, but not really expensive either. The fabric is tough as nails. The zippers are big and industrial strength. The interior is cavernous. The main savings is the weight--just 5.5 pounds versus 7-8 pounds for many others with this capacity. We bought the 20" duffle shown here, a trolley carry-on, a trolley backpack for our son, Lucas, and a larger, thin nylon duffle to fold up and use as needed on our return home. Click the image to see it on Amazon.