14” x 19”, rugged version of heavy black duck and nylon construction that can be personalized on a white, 11-square-inch outside flap. Loads of carry-on or storage space in the main compartment, three additional zipper pockets of various sizes, a mesh pocket for an ID or permit and special holders for a cell phone, a water bottle and pens. Adjustable back straps and a loop for easy carrying by hand or for hanging on a hook when not in use.