The Carhartt Mask is a one-size-fits-all hat/mask that's made of a 100% rib-knit acrylic. It's lined with a Thinsulate Flex 40 gram insulation for premium warmth. And it gives you extra length to protect your neck in the cold. Features the Carhartt logo proudly displayed on the front left of the neck. When you're looking for serious warmth in cold conditions, this is one of the Carhartt products you're looking for. Job-tested for your confidence.