Hi-Vis Clothing Class Checker
Select the work environment closest to your task to see the typical high-visibility clothing class required. Employers and site rules may specify a higher class than the minimum shown here, so always confirm against site-specific requirements.
How to Use This Tool
Select the environment closest to where the work actually takes place, not just the general site type – a warehouse worker who occasionally steps onto a loading yard next to moving trucks may need a higher class than one who stays entirely indoors. Site rules and client requirements often exceed the standard’s minimum, so always check local policy too.
Why Site Rules May Require More Than the Minimum Class
EN ISO 20471 sets minimum material area requirements for each class, but many sites, especially in rail, utilities and major roadworks, mandate a higher class than the technical minimum as a blanket policy. Always confirm the specific requirement for your site or client contract rather than relying on the general guidance above alone.
Required visibility class depends on traffic speed, light and background clutter.
Explore the full EN Standards Library for every standard referenced above, or read real Field Stories showing what happens when selection goes wrong.
Frequently asked questions
What is the difference between Class 1, 2 and 3?
The classes are based on the minimum area of background (fluorescent) material and retroreflective material the garment must provide, with Class 3 requiring the largest area and generally full torso and limb coverage.
Can a vest alone ever meet Class 3?
Generally no. Class 3 typically requires sleeves or a combination of garments such as a jacket and trousers to provide sufficient coverage area, since a simple vest usually cannot meet the area requirement alone.
Does colour matter for hi-vis compliance?
The standard specifies fluorescent orange-red, yellow, or a combination as acceptable background colours; the key compliance factor is the certified material area and retroreflective performance, not simply visual brightness.
How does hi-vis clothing lose effectiveness over time?
Washing, UV exposure, abrasion and general wear degrade both the fluorescent background material and the reflective tape over time. Inspect regularly and replace once colour fades or reflective tape becomes dull or damaged.
Do these classes apply outside the EU?
EN ISO 20471 is used widely across the EU and internationally, but some countries and industries reference other regional standards. Confirm which standard applies to your specific site or contract.