15.6-inch Computer Backpack Business Backpack Men's Simple Waterproof Schoolbag WomenProduct information: Capacity; 36 55L Bag internal structure: zipper pocket, mobile phone bag, ID bag, sandwich zipper bag Opening method; zipper Applicable gender: female Material: Canvas Function: breathable, waterproof, wear resistant, shock resistant, capacity expansion, load reduction Model: Kaman Style: business commute Lining texture: nylon Accessories type: Backpack shoulder pads Strap root number: double root Color: black, khaki, beige, pink