High-visibility vests are made of brightly colored fabric or have reflective materials to make workers and pedestrians more visible to traffic and equipment operators. ANSI class indicates the amount of high-visibility fabric and reflective tape on the garment, as well as width of the reflective tape. Non-rated and Class 2 safety vests have lower levels of visibility than higher numbers. They are worn when required by OSHA or when working in warehouses, near traffic, and on construction sites.
