EN ISO20471:2013+A1:2016 is the harmonized European standard for high visibility clothing. It specifies the requirements for signaling the users presence during day or night time. High visibility clothing is grouped into three classes related to risk assessment.The performance class can be obtained using a single garment or a clothing ensemble, e.g. jacket and trousers.

CLASS 3: Highest level
-Minimum background material 0.80 m2
-Minimum retro-reflective material 0.2 m2