High visibility vest is an article of safety clothing made of retroreflective materials. Vest is intended to provide visibility of the person wearing it in low day light or in the dark when illuminated by headlights of vehicles and mechanized equipment. Reflective safety vest is a common sight on a cyclist, a cheap solution that keeps them in drivers’ sight and minimises the risk of them getting into an accident.

Background material is fluorescent coloured fabric, usually safety orange or safety green. It's the brightly colored mesh or fabric you think of when thinking of safety vests. The material is highly visible during the day. Retroreflective material is the striping you see on safety vests. These are intended to provide visibility of the person wearing it in low day light or in the dark when illuminated by headlights of vehicles and mechanized equipment.