Class 1 (Type O Only): Provides minimum amount of hi-vis material required to differentiate worker visually from backgrounds around noncomplex work environments. These garments are considered “Non-ANSI apparel”.
Class 2 (Type R & P): These provided additional hi-vis materials and may allow design opportunities to define the human form more effectively. Class 2 garments typically provide longer detection and identification distances, and increased conspicuity performance compared to Class 1. They are required when working near roadways where traffic speeds exceed 25 mph.
Class 3 (Type R & P): These offer greater visibility to the wearer in both complex backgrounds through a full range of body movements. Mandatory placement requirements for background, retroreflective and combinedperformance materials on sleeves and pant legs. They are required when working near traffic speeds in excess of 50 mph. Sleeveless garments or vests are never considered Class 3.
Class E: Supplemental apparel such as bibs, shorts, and gaiters, which are not compliant when worn alone, though, when combined with Class 2 or Class 3 apparel, the combination satisfies the Class 3 requirements.