RefrigiWear Men's Extreme Freezer Insulated Waterproof 8" Leather Work Boot, Black Warmth down to -40 degrees F with 1200g Thinsulate Ultra insulation Stay safe in extreme conditions with anti-Slip RefrigiWear sole, rubber toe guard, rubber heel plate and electrical hazard compliance Protection from the elements with waterproof leather upper Get extreme comfort with VitaComfort, RefrigiWears exclusive gravity-fed moisture management and comfort system Part of RefrigiWears premier Extreme Collection  the best of the best in cold protection