Carhartt developed Mudrunner Rubber Boots with Insite Technology to dramatically change the comfort and performance of the Vulcanized boot category. In rain, sleet, snow, dirt, mud or sludge these Carhartt Rubber boots will help you power through. The outsole and foot part to above the ankle are Vulcanized utilizing formulated rubber and the shaft to above the calf is 5mm Neoprene Rubber to keep you warm and dry. The heel incorporates a kick stop feature to aid in pulling the boots off at the end of the day. Every style in the collection incorporates the Carhartt Insite Technology Footbed that is engineered to create maximum arch support to reduce foot fatigue during long days on the job. FastDry Technology linings wick away sweat. The outsole bottom features multiple enhancements for traction, liquid disbursement, anti-skid and anti-clog lugs.