The high visibility clothing is a type of personal protective equipment (PPE) that has highly reflective property or colors so that it can be easily discerned from any background. For example, yellow waistcoats are commonly worn by emergency service personnel.

Part of the surface of the fluorescent garment is covered by retroreflective stripes. This way they become much more visible in the dark for observers near a light source, such as the driver of a car with the car’s headlights on.

The patterns of the retroreflecting parts also help to distinguish between objects and people. Area reflective fabric has proven to be the most effective way of outlining the body, so that drivers can distinguish a human shape at night

For greater visibility of the high visibility clothing during the day, extremely bright colors are used for the main body of the garment by applying fluorescent material.