106920 Carhartt Knit Rubber Patch Beanie This acrylic watch hat is one of the most iconic pieces Carhartt makes. This version of the A18 has a rubber patch that matches the color of the beanie. It's made of soft, stretchy rib knit that keeps out the cold. 100% Acrylic stretchable rib-knit Cuffed beanie with rubber patch sewn on front Classic beanie silhouette Rubber patch sewn on front