National Marker Company sign with legend ?CAUTION ? WEAR EAR PROTECTION? is commonly seen at construction sites and industrial facilities to mark the areas where ear protection is mandatory. It helps in enforcing health and safety standards in areas with high decibel noise. The caution sign complies with OSHA standards and displays the message in yellow text on black base and black text on a yellow base. The material is UV resistant, chemical resistant, graffiti proof and has NMC Sign Muscle coating that protects the text against fading, scratches, scuffing, mold, and moisture.