STC Men's 8" Duncan II Safety Work Boots, Sizes 7-13

Metal Free Leather Work Boots with Vibram Fire and Ice Outsole

Overview

Some job sites require metal-free footwear for screening but the crew still wants real leather, not synthetic. The STC Duncan II 8 work boots are the only metal free leather work boots in the STC lineup. Composite toe, composite puncture plate, polymer eyelets, polycarbonate shank. Zero metal. Full-grain waterproof leather. Vibram Fire and Ice outsole for grip in freezing cold and extreme heat. 200g Thinsulate for warmth.

Specifications

Key Features

• 100% metal free. Composite toe, composite plate, polymer eyelets, polycarbonate shank. The boot clears metal detector screening at secure facilities, airports, and government sites.
• Full-grain waterproof leather with sealed seams. Unlike the vegan Shire, the Duncan II gives workers who prefer leather the same metal-free protection in a traditional material that molds to the foot over time.
• Vibram Fire and Ice outsole grips frozen surfaces, wet concrete, and hot environments. The natural rubber compound stays flexible in cold down to -23°C and resists degradation up to +250°C.
• Goodyear welt construction is resoleable. A cobbler can replace the worn outsole without replacing the boot, extending its working life by years.
• 90° heel angle catches on ladder rungs during climbs. This is a ladder-compatible heel, not a wedge sole. Important for construction, utility, and any trade involving regular ladder use.

Applications

• Secure facilities, airports, and government buildings require composite-toe leather safety boots that clear metal screening.
• Cold-weather outdoor construction in Canada with insulated metal-free work boots and ice-grip outsoles prevents slips on frozen ground.
• Ladder-heavy trades (utility, electrical, roofing) where the 90° heel provides rung contact.
• Workers who prefer leather over synthetic but need metal-free certification for their job site.
• Environments with temperature extremes where the Fire and Ice outsole performs from -23°C to +250°C.

How Vibram Fire and Ice Handles Extreme Temperatures

Most rubber outsoles harden in cold weather and lose grip on frozen surfaces. The Vibram Fire and Ice compound on the STC Duncan II safety boots is formulated to stay flexible and grippy down to -23°C, which is why STC chose it for an insulated winter work boot. The same compound resists degradation up to +250°C, so it holds up on hot asphalt, near welding sparks, and on sun-heated metal decking in summer.

STC uses three different Vibram compounds across its lineup. TC4+ on the Shire is optimized for oil resistance in industrial settings. Megagrip Pro on the Blacksmith is built for varied terrain. Fire and Ice on the Duncan II is the cold-weather and temperature-extreme specialist. Choosing the right Vibram Fire and Ice work boots starts with matching the outsole to the conditions the worker faces most often.

Buy STC Duncan II 8" Work Boots Online from Cleanflow

Cleanflow Utility Supply Company stocks the STC Duncan II 8 work boots in sizes 7 through 13 (Wide) as part of the full STC Footwear collection. The Duncan II ships with a Vibram Fire and Ice outsole, composite toe, 200g Thinsulate, Goodyear welt, and all CSA certifications.

Cleanflow carries the best metal-free leather work boots from STC at a competitive price, with free shipping on orders over $199 and a 30-day return policy. Ships across Canada and the United States. Email info@cleanflow.ca for sizing guidance or to confirm stock in your size.