Hi-Vis Class Ratings
Conformance Grid – ISO 20471
ISO 20471 class 3 can be obtained by combining the class of the upper and lower garment providing the two garments meet the minimum requirements for the class 3 when worn together.
See the grid below for examples.
Conforming to ISO20471 Class 3
In the UK, the Traffic Signs Manual adds that clothing for those working on motorways or high speed roads must conform to ISP20471 class 3 and that jackets or coveralls must have full length sleeves, two reflective bands encircling the body and two encircling the sleeves, with two reflective braces over the shoulders. Therefore, only the combinations highlighted Green would be suitable on high speed roads.
Achieving the
ISO Class you
Require
Class 1
Waistcoat
Class 2
Waistcoat *
Class 1
POLO
Class 1
Waistcoat
Class 1
Waistcoat
Class 1
Waistcoat
NON-
CONFORMING
Trousers
Class 1
Class 1
Class 1
Class 1
Class 1
Class 1
Class 1
Trousers
Class 1
Class 1
Class 1
Class 1
Class 1
Class 1
Class 2
Trousers
Class 3
Class 3
Class 3
Class 3
Class 3
Class 3
Combine the upper and lower garments to achieve the ISO Class your working environment requires.