THE CLOWNFISH BANGE 21 Litres Large Space Expandable Unisex Polyester 2 in 1 Outdoor Travel Laptop Backpack fits 15.6 inch laptop (BLACK) PREMIUM MATERIAL: This multifunctional bag is made of Water Repellent polyester material to protect your goods from water. For the inner lining, soft feel polyester is used. The hardware such as zippers, pullers and buckles used are wear resistant, smooth, of and durable. EXPANDABLE CAPACITY : Comes with 2 roomy spaced compartments with internal zipper and open pockets. The spacious compartments can hold clothings and other travel accessories. The expandable compartment comes with soft flannel that protects up to a 15.6 inch laptop with added Tab pocket and it can reduce the friction between the backpack and the computer. Front vertical zipper pocket to hold files, folders etc and extendable side pocket as bottle or umbrella. USB FEATURE : With a built in USB charger outside and a built in charging cable ,this usb bag offers you a more convenient way to charge your electronic device anywhere. This backpack doesn't power itself, you need a power bank to charge it TROLLEY STRAP & CONVENIENCE : The insertible pull rod box design allows the bag to slide over the luggage handle for easy mobility during traveling. Comfortable airflow back ergonomics design with soft padding, gives you maximum back support. Breathable and adjustable shoulder straps with glasses hanging hook relieve the stress of shoulder. Anti theft Back pocket can store items that can be easily accessible. ONE YEAR WARRANTY: 1-year warranty on this bag against any manufacturing defects. Just keep your safe.