104485 Carhartt Men's Insulated Face Mask On brutally cold days the work still has to get done. This men's face mask is made of soft acrylic rib-knit fabric and is insulated for more warmth. The extra-long neck provides additional weather protection. Stretchable rib-knit fabric Thinsulate Flex 40 gram insulation Overlock stitching around eye opening Long neck Carhartt label sewn on front Fabric 100% Acrylic Insulation: 40-gram | 65% Polyethylene / 35% Polyester Thinsulate Flex