50L Large Capacity Storage Space: The independent laptop compartment can hold 17-inch laptops. Multiple compartments and pockets hold everyday items and electronic accessories, keeping your things organized and easier to find. The business backpack is made of high-quality oxford cloth, polyester, and leather, which is waterproof, shockproof, and soft (black color uses 900D oxford material, others are made of 1680D oxford). This multifunctional laptop backpack can be used as a tote, shoulder bag, and backpack. There is a hidden anti-theft pocket on the back to protect your valuables from theft. It features an external USB charging port with a built-in charging cable, offering you a more convenient way to charge your phone while walking. Comes with a lock.