From Tumi, the Voyageur Just In Case Nylon Backpack features:  Nylon  Lightweight backpack folds flat to be completely packable Keep it in its small zip pouch that can easily be stored inside larger bags for those moments when you need it "just in case." Approx. 15.5" x 12.3" 4.5"  Weight approx. 0.6 lb. Spot clean  2-year limited manufactures warranty  Exterior Features Double-zip entry to main compartment Top handle Front zip pocket Adjustable backpack straps Zip pouch with snaps that attach to bag interior Interior Features: Snaps to attach pouch Imported.