This gray backpack has a large capacity, multiple compartments, computer compartment and flat compartment, separate clothes storage compartment, front pocket with a multi-function bag, pens or other small items, can also hang a key chain; The rear frame is provided with a sandwich package, soft shock absorption, a pull rod sleeve, a USB port on the side, an adjustable slip-proof buckle on the strap, and a triangular reinforcement. Suitable for business travel, travel travel.