This 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." Dimensions 15.5" X 12.3" X 4.5" Weight 0.6 LB Primary Material Nylon Style #146588T522 Only used twice! Only slight mark on inside of backpack in photo 3, otherwise like new! Make an offer!