This is the European standard for high visibility clothing. It states that those operating in hazardous situations must be visible in any light conditions, day or night. The standard provides for two performance parameters:

X - Surface of fluorescent and retro-reflective material (3 levels)
Y - Quality of the retro-reflecting materials (2 levels)

Class 3: Highest Level

This describes the highest level of protection, required for those working on or near motorways, dual-carriageways or airports. The clothing must feature at least 0.80m² of fluorescent background material and 0.20m² of retro-reflective materials. (4 meters of 5cm wide reflective tape)

Class 2: Intermediate Level

This level of protection is necessary for those working on or near A and B class roads and for delivery drivers. The clothing must feature at least 0.50m² of fluorescent background material and 0.13m² of retro-reflective material. (2.60 metres of 5cm wide reflective tape)

Class 1: Minimum Level

This level of protection is relevant for those working on a private road, or to be used alongside class 2 or 3 high visibility garments. The clothing must feature at least 0.14m² of fluorescent background material and 0.10m² of retro-reflective material.