Duluth pack

A Duluth pack is a specialized type of backpack made of heavy canvas, leather, and/or cordura nylon.

[1] The simplest and most traditional Duluth pack comprises a single large envelope which is closed by straps and roller buckles.

[2][3] The pack has its origins in an innovative nineteenth-century French-Canadian shoemaker named Camille Poirier, who made his way west to Duluth, Minnesota,[4][5] Arriving in 1870 with his "little stock of leather and tools."

He began a small shoe store on the shores of Lake Superior, and quickly made a go of it in the booming frontier town.

[4] Out of his small shoe shop on the waterfront, Camille began building a new style canoe pack with a tumpline, sternum strap, and umbrella holder.

Canvas and leather pack produced by Duluth Pack . Their #4 has a "set out" and so is box-shaped.
The #3 canvas and leather pack is produced by Duluth Pack and is envelope-shaped.