EXTERNAL DIMENSION: 19.2 x 14.2 x 7.5 inch (L*W*H) with 3 main & 8 inner small pockets offer lager roomy capacity. Color (Balck or Grey) and fashion appearance, suitable for any occasion. LARGE CAPACITY & ROOMY COMPARTMENT: Large capacity storage bag, generous separated 10+ compartments with soft firm padded sleeve for 15.6 inch laptop, books, clothing and daily necessities, offer your items a safe and tidy place. TEAR-RESISTANT&MULTIPURPOSE: Made of waterproof Nylon Fabric, durable metal zippers and light backpack straps offer less pressure to shoulders and back, super high quality provides long time usage. Padded back panel, combined with adjustable "S" curve shoulder straps offers extra back support and ultra comfort PRACTICAL FUNCTIONS: External USB interface and built-in USB charging cable for convenient charging, connecting electronic device and using portable charger without opening the laptop backpack. External hole for earphones on the front side, offering an easy access to use headphones and microphone. WATER RESISTANT: Optimizing jacquard Oxford Nylon fabric texture clear, feel comfortable, water resistant, wear resistant and durable.