STORAGE SPACE & POCKETS: A separate laptop compartment holds a 15.6-inch laptop, as well as 15-inch, 14-inch, and 13-inch laptops. A spacious packing compartment is roomy for daily necessities, tech electronics accessories, and a bunch of other items, making your items organized and easier to find. COMFORTABLE AND STURDY: The breathable mesh shoulder straps with ample sponge padding and the chest belt make the shoulder straps fit snugly to your shoulder, so don't worry about the straps slipping down and hurting your shoulder from a heavy bag. The laptop backpack with Airflow three-dimensional ventilation design helps with air convection and heat elimination. USB PORT DESIGN: With a built-in USB charger outside and a built-in charging cable inside, this USB backpack offers you a more convenient way to charge your phone while walking. It's a great tech gift for him from wife, daughter, and son. Please note that this backpack does not power itself, the USB charging port only offers easy access to charge. Remove the USB charging cable when cleaning the backpack. WATER RESISTANT AND DURABLE MATERIAL: Made of water-repellent fabric and durable metal zippers. Ensure safe and long-lasting usage every day and weekend. Suits you well as an office work bag, a slim USB charging bag, a large student backpack for boys, girls, and teens. CONVENIENT STORAGE: Laptop backpacks with front zipper pockets, easy for holding a water bottle, readers, and a bunch of other items, diary, pens, and pencils. Notebook computer bag Side pocket holds compact umbrellas and other small items.