Features: Waterproof Material: The backpack is made of waterproof and durable high-density oxford cloth strong and durable presenting quality while taking into account practicality. Multiple Compartments: The laptop backpack has many pockets and wet and dry separation pocket to keep your items organized and easier to find well organized grouping to meet your daily needs. Ergonomic Design: According to the ergonomic design comfortable shoulder straps and thickened shock absorbing pad fit the curve of the human shoulder and neck divide the gravity so that the back more snug and more comfortable. Back Tie Strap: Backpack with back tie strap can be fixed on the luggage convenient and practical to say go on a trip. Function: External USB charging port by connecting your own power supply to charge your electronic devices very convenient cell phone battery life on the go is guaranteed. Specifications: Material:Oxford cloth Size: 41*28*10cm Weight: 660g includes: 1 *Laptop Backpack "