Travel Laptop Backpack,College School Backpack With USB Charging Port, Extra Large TSA Water Resistant Business Backpack,Big Computer Bag Fit 15-6 Inch Laptop And Notebook-grey&green Guarantee&Warranty: We will replace new one for any damage or defect for any reason free of charge within 3 years. If you have any questions, please feel free to contact us, and we assure you of our best personal service. Premium Material&Dimension: Made of water-resistant 600D nylon and polyester. The 600D nylon is tough, firm and does not fade, and it lighter than other normal laptop backpack. 18.9"*14.2"*9.8", dedicated padded laptop sleeve and for tablet pouch with stretch velcro strap fits 15.6-inch laptops and notebooks. Large Capacity&Organized: Two main compartments for ipad and computers, front organizer pockets for your keys, writing utensils,cloths, chargers, and one of the front pockets is designed for putting your glasses. The last pocket is convenient for you to take the electronic products out when you pass security check. Side additional comfortable mesh pockets for water bottle and umbrella. 20+ independent pockets allow you to store all of your essentials in its place. Multifunction: Multi-panel Airflow system provide relief when carrying heavy loads, less stress on your shoulders, protect your spine for work, school,business, hiking, mountaineering, camping. Our straps can be stretched, have a damping effect. Mesh back has a strong breathability, and a mesh pocket on strap can put your mobile phones. Practical&Convenient: The laptop backpack has a external Micro-USB with set-in charging cable and a inside special pocket for putting mobile power conveniently works with any electronic device anywhere. Our backpack has a rain cover with an elastic buckle strap to help secure the cover to the pack. Waterproof cover protects backpack, expensive laptop from rain and snow, dust and mud. The backpack rain cover improves visibility in rainy, foggy day and dark night.