Come and see our amazing products. The backpack is made of durable and waterproof polyester. Multi-Pockets,with USB port,special safe phone-pocket on the back,trolley sleeve. It fits 15.6 inch laptop. Comfortable padded strap,breathable and adjustable,airflow back design with thick and soft padding. With an anti-theft pocket on the back,protect your valuable items from thieves,near the USB port,you can put your cellphone in when charging. Pls confirm further with us if any query about packing info, inventory status and time schedule.