Come and see our amazing products. This Backpack apply anti-theft design techology. Zipper of main pocket is fully hidden in the back of this bag,no theft will easily open your backpack. Water repellent Travel Rucksack made with tear-resistant durable nylon fabric and its dual-access zipper with anti-theft design allows for easy access and increases safety. Equip with a secret pocket which behind the bag. It's super good for travel,work or school. External USB with built-in charging cable offers a convenient charging of your electronic device anywhere, and this bag do not include a battery, you need a power bank to charge it. 30 degrees or 90 degrees adjustable main compartment ,equip with varies function pockets for pens ,phone ,wallet and some slim 15.6 inches laptop. There is a retro reflective tape on the front of the b Pls confirm with us about the packing info, stock color and exact production time before placing your order.