American Shiled Laptops backpack with Audio Interface.notebook tablet computer,knapsack,rucksack bag Comfortable back Ergonomic shoulder straps for man woman travelling,camping,Hiking business and casual AS1630BZ-Black Shoulder Strap System: Specially shoulder straps are ergonomically designed with added padding for comfort and control. Water Bottle Pocket: External dual pockets feature elasticized mesh, which expands to secure various size water bottles. Open Viewing Compartment: Unique quick recognition window design accommodates most laptops. Airflow Back System: Multi-panel airflow design provides extra padding for comfort and maximum back support. Organizer Pocket: Interior organizer provides divider pockets for pens, pencils, cell phone and CD's.