EN 471 - HIGH-VISIBILITY
Visibility during the day, in the twilight and in the dark.
Thanks to high visibility warning clothing, the wearer will be seen when visibility is low :
• during the day, because of the fluorescent background material
(fluorescence due to presence of UV light).
• during the night, when the retroreflective stripes reflect the oncoming headlights.
X: the area of fluorescent background material and retroreflective material
Y: performance of the retroreflective material