The National Marker Company sign with the legend “CAUTION - FALL PROTECTION REQUIRED” is commonly used in construction sites to instruct workers to wear fall protection when they are working at a height. The caution sign shows the message in black text on a yellow base with white text on a black base so that it is clearly visible and easily readable even from a distance. The clear, bold letters make the message easily readable even from a distance. Complying with OSHA standard, the sign has an NMC Sign Muscle coating that protects the text against fading, scratches, scuffing, and moisture.