The Woody Max has been a Muck fan favorite for over a decade. Whether in the blind or the stand, this 100 percent waterproof boot with a warm 5mm CR Flex-Foam fleece liner with the added 2mm thermal foam under foot will keep you warm and dry. It?s a proven combination at frigid temperatures. The Woody Max features acomfort rating of -40 degrees to 40 degrees Fahrenheit.