Carhartt Signature WorkFlex Cap. A comfy, good – lookin’ cap for all occasions. 4-wheeling, at the ballgame, on the clock, around the campfire… Carhartt’s Signature WorkFlex Cap has you covered. Made with a 97/3 cotton / spandex blend, it features low-profile styling with a pre-curved visor and stretchy WorkFlex construction that makes for the perfect fit everytime! The Carhartt label is embroidered on the front, and the Carhartt “C” is embroidered on the back.