A very lightweight pet backpack with a built-in steel frame, a three-dimensional super large space, and super strong load-bearing capacity; The fabric is made of environmentally friendly 600D waterproof Oxford cloth, which cares for the health of pets; There are multiple breathable windows, which are breathable and not stuffy. There are 2 soothing openings on the side, and the owner can reach into the bag to comfort the pet; There are multiple pet import and export facilities, suitable for pets of different sizes to enter and exit; There are large capacity pockets with built-in safety locks and reflective strips for safer travel; Foldable, saving storage space.