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EN ISO 20471:2013

EN ISO 20471:2013, High visibility clothing – Test methods and requirements


EN ISO 20471 is a revised version of the previous EN 471 high visibility PPE standard.


It’s International Standard which specifies requirements for high visibility clothing that is capable of visually signaling the user’s presence. The high visibility clothing is intended to provide conspicuity of the wearer in any light condition when viewed by operators of vehicles or other mechanized equipment during daylight conditions and under illumination of headlights in the dark.



This is the standard that you must comply with. Performance requirements are included for colour and retroreflection as well as for the minimum areas and for the placement of the materials in protective clothing.


Three classes of garment are defined based on three different minimum areas of retroreflective, fluorescent and/or combined performance materials. Each of these classes will provide a different level of conspicuity, class 3 being the class that provides the highest degree of conspicuity against most backgrounds found in urban and rural situations in daylight and in night time. Users should select the required class of performance based on a risk assessment of the location/situation in which the protection afforded by clothing to this International Standard is required. 


Class 2: Intermediate level of protection 

(Sleeveless waistcoats, tabards, bib and brace trousers)
0,5 m2 fluorescent material / 0,13 m2 retroreflective material


Class 3: Highest level of protection

(Coats and jackets with sleeves, coveralls, two piece suits)
0,8 m2 fluorescent material / 0,2 m2 retroreflective material


There are within the standard, certain requirements for in-use Test Requirements.


Retroreflective materials require brightness after: Rainfall Performance, Temperature Variation, Abrasion, Cold folding, Flexing, Washing and Dry cleaning (where applicable)


Flourescent materials: UV exposure, Dimensional change, Water vapour resistance, Colour fastness, Mechanical properties