The Superduty is our trophy boot, our reputation was built on it. Built to tackle the toughest jobs in any terrain, and we&';ve got the boots on the ground to prove it. With the highest quality build and materials on the planet, give them a challenge worth their grit. The unique combination of the bison&';s strength and flexibility is prominent in our entire Bison collection. The moment you slip on a pair of these one-of-a-kind work boots they mold to your feet because of how soft and thick the hides are. Expect no break-in, instant comfort, and long-lasting support wherever you roam. Specifications Shaft Height - 10" (boot heels excluded) Uppers - Smooth 8oz premium oil-tanned USA leather Lowers - Smooth 8oz premium oil-tanned USA leather Thread - High strength, TechnoraA(R) thread, fire resistant to over 900 AdegF Hardware - Traditional brass high-quality eyelets and speed hook combo Insole - Genuine oak-tanned leather Midsole - Genuine oak-tanned USA leather Arch support - USA leather Sole - Vibram RedX Fire Hard Adhesive - Fire ready adhesives throughout boot construction Origin - Handmade in the United States of America Some Bison boots use fire-rated materials, but Bison is not recommended for fire use. Check out our Fire Collection instead. *Composite Hard Toe Tested to ASTM-F2412-18/ASTM-F2413-17 a ASTM-F2412-11/ASTM-F2413-17 standards *meets or exceeds standard steel toe boot safety requirements (The ASTM-F2413-17 rating reflects the same safety testing and rating as the ASTM-F2413-18 of which the key modification is to the inner tongue label for better identification purposes.) Disclaimer Some Bison boots use fire-rated materials, but Bison is not recommended for fire use. Check out our Fire Collection instead. *We have updated our construction method on all Superduty & Fire Inlander products from our 270 Stitchdown to a 360 Stitchdown construction. Both of these methods meet the same NFPA 1950 standards. If you receive a 270 degree construction, and wish to specifically have a 360 construction please email general@jkboots.com*