The sign can be used to warn people to have the right kind of clothing when going to areas where there are dangerous machines or where they may risk damaging their clothes. However, some people may not see the need to have protective clothing and thus this would be a perfect way to remind them. You can also purchase more than one sign to be used in large areas that may require multiple warning signs. At night or in absence of light the sign will glow and remain visible as it is Jalite AAA photoluminescent.