Back pack: We have sold more than 10 million backpacks, we always provide wear-resistant, durable, high-quality and inexpensive products.Large CapacityFeatures three large pockets, separate compartment for 15.6 inch laptop and multiple pockets, roomy compartment for daily use that keeps things organized and easy to find. The size of the laptop backpack is 18.5*12.6*6 inch, ideal for everyday use, unisex, for example, school, work, travel, hiking, camping, hiking. shopping, cycling and dating.MaterialsThe bag is made of waterproof and durable Oxford material with soft zipper and padding, soft cushion can protect your laptop. The laptop backpack is waterproof, wear-resistant and shocks.Unique design: USB charging port Headphone jack, built-in charging cable and headphone cable can be used at the same time. This backpack cannot charge the USB charging port itself. This is just a quick charge. You have to bring your own loading treasure. You can connect to the mobile power network anytime, anywhere. Buy a backpack with a metal lock. For more details, please refer to the manual.