American Shield Pattonc series Laptop backpack--TRUE WATERPROOF,TEN years warranty.Super capacity 40L/45L.computer notebook tablet,knapsack,rucksack army knife Militery style bag for man woman Travel Camping bag Hiking Leisure Fashion-ASPC40L (11 45L Black) Super capacity 45L. Plenty of space to carry whatever you need. Super wear resistance. Airflow Back System: Multi-panel airflow design provides extra padding for comfort and maximum back support. Comfortable back panel Ergonomic shoulder straps