Description 1. Waterproof nylon material. Dimensions: 16.5L x 4.7W x 12.2H. Weight: About 1 lb. The white part is more like a soft beige than pure white.2. Imported, nylon lining, zipper closure3. USB charging port: The built-in USB port design makes it convenient for you to charge your phone by connecting to a power bank without opening the backpack on the go. (excluding power bank)4. Waterproof fabric: Made of waterproof, durable and breathable nylon fabric. Double padded, reinforced and adjustable shoulder straps provide optimum comfort and fit as snugly as your shoulders allow.5. Large capacity: Internal main pocket: Laptop lining can hold 15.6 inch laptop. External: 2 front zip pockets, 2 side pockets and 1 front pocket with Velcro. Wide opening design, rectangular opening for easy access to bottom items. Not too bulky, but holds everything you need.