The National Marker Company this sign clearly informs workers or employees that hard hat is required in a specific area. It is mostly seen at construction sites, industrial units and chemical plants to enforce safety standards. The legend ?HARD HAT REQUIRED? is printed in legible and bold text to ensure better visibility even from a distance. The square sign is UV resistant, chemical resistant and graffiti proof. The sign has NMC Sign Muscle coating to protect the text and graphic against fading, scratches, scuffing, mold, and moisture.