Class 1 provides the minimum amount of high visibility materials required to differentiate the wearer visually from non-complex work environments, in scenarios in which the struck-by hazards will not be approaching at roadway speeds, therefore the operative detection and identification distances in the work environment can be shorter than in other situations without compromising safety.
Class 2 provides for the use of additional amount of high-visibility materials, which may allow design opportunities to define the human form more effectively. Class 2 have the potential to provide longer detection and identification distances, and increased conspicuity performance compared to Class 1.
*Note: Class 2 is considered a minimum practise for high visibility clothing in roadway and temporary traffic control zones (MUTCD).
Class 3 can offer greater visibility to the wearer in both complex backgrounds and through a full range of body movements by mandatory placement of background, and combined performance materials on sleeves and pant legs. Class 3 offers the highest conspicuity performance.