This Case Logic TK Expandable Messenger Bag provides serious styling for the casual professional and the expandable feature doubles bag's width for additional carrying capacity. The durable 1680 and 840 nylons provide a premium look and feel. It holds most 15.4" laptops (internal compartment dimensions 13.75 x 12 x 1.75) and the colored internal lining allows you to see what's in your bag. The full-featured organizational panel stores your portable electronics, pens and more. The matching USB shuttle holds two USB drives. It features adjustable shoulder strap, rear magazine pocket and grab handle. In addition, the two zippered compartments provide additional storage.