ANSI Class III Safety Vests

Class 3 safety apparel is worn in inclement weather, under heavy traffic conditions, or when complex backgrounds impair visibility. According to the ANSI/ISEA 107-1999 National Standard, "conspicuity is enhanced by high contrast between the clothing and the ambient background against which it is seen." When Class E garments (trousers) are worn with a Class 2 vest, waistcoat, jacket, or poncho, the overall classification for the ensemble is ANSI Class 3 safety apparel. The standard specifies that apparel must be capable of signaling the user's presence visually. Retroreflective trim, such as that on Class 3 safety vests, is intended to provide conspicuity for the user in hazardous situations. Fluorescent lime-yellow trim enhances visibility under any light conditions during the day, while retroreflective trim is brightly visible under illumination by vehicle headlights in low light or dark conditions.

Conspicuity Class 3

• For pedestrian workers and vehicle operators whose high task loads place them in danger
• When wearer must be conspicuous through the full range of body motions at a minimum of 390 m (1280 feet)
• When wearer must be identifiable as a person
• When workers are exposed to traffic moving at speeds exceeding 50 mph