Extra large backpack perfect for trips or when you hvve got a lot to do! | Interior laptop pocket | Three exterior pockets, including two for bottles and one for quick-access items | Reflective strips keep you safe while commuting | Water-resistant; not water-proof | Lasptop pocket: 12"x 12" x 1.5" | The bag itself is light when empty, so it will not pull you down when loaded up.