This is 43 Liter Travel Backpack, you get 3 medium packing cube free with this bag. Travel Nest Expedition comes with a preinstalled Rain Cover, bag is made with high quality ripstop polyester fabric with bright color polyester lining too. 2 Waterproof pockets are located outside the bag's side which can be used to store travel documents and quick access gadgets. Bag is padded from all sides & main interior opens 180 degree which help users to organize comfortably. Bag has 17.3” laptop compartment & separate 12.9 inch tablet compartment. Velcro pocket patch & stretchable mesh pockets to store foldable quadcopters.