Comfort Rating: -60°F to 10°F The BOA® Fit System for a micro-adjustable fit that won't come loose Anti-Slip RefrigiWear® outsole You’re not one to put your feet up on the job, even with long shifts in extreme conditions. Fight foot fatigue and frigid conditions while staying safe with the Extreme Pac Boot, comfort rated for temperatures as low as -60°F. Our cold-weather work shoes have 9-inch waterproof nylon and leather uppers. These winter work boots fight fatigue with VitaComfort®, which absorbs the shock to your feet from walking and standing all day. The boots are also electrical-hazard compliant for added safety. Dial into comfort with the durable BOA® Fit System for a fast, effortless, snug fit all day, without removing your work gloves. Comes with 1 pair of 1700L liners. The entire Extreme Collection, now with head-to-toe protection, was designed for comfort, style, and the ultimate warmth. When the cold warns you to stay at home, take it to the Extreme. Comfort Rating: -60°F to 10°F 9" Leather/nylon upper Anti-Slip RefrigiWear® outsole ASTM Composite toe The BOA® Fit System for a micro-adjustable fit that won't come loose Innovative lightweight BOA® M4 dial Easily adjust fit without removing your gloves Waterproof Rubber heel plate for easy kick off VitaComfort® anti-fatigue and gravity-fed moisture management system Electrical hazard compliant Comes with one pair of 1700L Liners, which have 600g insulation and DRI-BLAZE® lining Incredibly lightweight compared to other pac boots Extreme Pac Boot