This excellent Duluth pack is made of sturdy, heavy canvas and what looks like bridle leather. It shows virtually no sign of wear - the leather is in fine condition except for some crinkling where it's gone through the buckles, and the canvas is clean. It has a non-removable laptop sleeve inside, perfect to protect any electronics you may want to toss in there, and providing some rigidity like an internal frame.

Note: the one picture looks like staining on the back. It was actually shadow. See other pictures.