RefrigiWear PolarForce Max Boot 1140CRBLK140 | Black | Size 。RefrigiWear PolarForce Max Boot - Waterproof, Insulated, and Anti-Slip for Extreme Cold Finally, insulated boots that don\'t skimp on comfort! The PolarForce® Max Boot is waterproof and armed to protect you against -40°F cold with heavy-duty insulation and our comfortable DRI-BLAZE® lining. Keep out winter-weather elements with our waterproof work snow boots. Each boot has an ASTM composite safety toe, rubber heel plates for easy kickoff, and Anti-Slip RefrigiWear® outsoles for added protection and extra durability for all types of frigid working conditions. These work boots are also electrical-hazard compliant for added safety. The 8-inch leather upper is waterproof, and these winter work boots fight fatigue with VitaComfort®, which absorbs the shock to your feet from walking and standing all day. Never compromise protection for performance. When you\'re protected no matter what, you get the job done right. Outlast, outperform and be a force of nature with PolarForce®. Get the job done quickly, safe and right, so you don\'t miss out on the important things at home. Dig a ditch. Mend the fence. Whatever items your to-do list has, you can check them off with the PolarForce® Collection. INSULATED BOOTS: Get serious protection and warmth in extreme cold conditions with our insulated boots for men. Our work boots keep you comfortable between -40°F and 10°F (-40°C and -12°C). These boots have 800 grams of Thinsulate insulation to protect you from freezing weather.