The thing on Duluth's website/catalog that draws the most attention from me is their copious use of fire hose canvas. Recognizing that this is a particularly tough yet pliable material, DTC makes pants, jackets, vests, parkas, bibs, coveralls, wallets, hats, bags, and even stretch pants out of the stuff. It's stain-resistant, tougher than duck canvas and their customer testimonial section has insane things to say about the material, from withstanding a wild boar attack (WTF?) to a marine construction worker who wears it over his wetsuit as an anti-chafing measure while doing underwater welding.
Check it out here.