Clothing to this standard specification is designed to ensure that the wearer is conspicuously visible and recognisable as a human being by vehicle drivers in all light conditions and from all sides. This standard applies to high risk situations. High risk situations exist, for example, whenever a person is not actively participating in the traffic scene but is occupied with other procedures (work or emergency situations) - i.e. is a passive road user.

EN ISO 20471

High-visibility clothing is labelled with the graphic symbol ISO 7000-2419.

The 3 classes are classified as follows:

High risk class 3:

Vehicles have a speed of > 60km/h

High risk class 2:

Vehicles have a speed of ≤ 60km/h

High risk class 1:

Vehicles have a speed of ≤ 30km/h 

At traffic speeds ≤ 15km/h, there is only a medium risk of danger even for passive road users. It is important to note that in the case of local influences such as weather conditions, contrast of the surroundings, traffic density and other factors, one of these influencing factors can lead to a higher level.

 X: Amount of visible material (background and reflective material). The number next to the graphic symbol (here X) indicates the clothing class.

Regardless of the minimum areas, Class 3 clothing must have retroreflective stripes on the torso and at least either sleeves or long trouser legs.