Features: - Anti-theft backpack: This Backpack applies anti-theft design technology. Zipper of the main pocket is fully hidden in the back of this bag, no theft will easily open your backpack. This is super good for travel, work, or school - USB charge port and water Repellent fabric: External USB with a built-in charging cable offers a convenient charging of your electronic device anywhere, and this bag does not include a battery, you need a power bank to charge it - Multi-Compartment backpack: 30 or 90 Adjustable main compartment, equity with various functions pocket for pens, phone, wallet, or 14 inches laptop - Night safety backpack: There is a reflective stripe on the front of the bag which makes this backpack more conspicuous at the night. This is a safe backpack for you to walk in the night