Standards hub · High-visibility workwear
"Hi-vis" isn't one thing — it's three classes, one standard, and a decision that hangs on how fast the traffic moves and how bad the light gets. This hub gives you the whole picture, then points to the detailed guides.
The short version
High-visibility clothing works two ways at once. Fluorescent background fabric lifts the wearer out of the background in daylight; retroreflective tape bounces headlights back at drivers after dark. A compliant garment needs enough of both, and the standard that sets "enough" is EN ISO 20471.
That standard sorts garments into three classes by the minimum area of each material. More area = visibility at greater distance and worse light — so the class you need is driven by risk, chiefly the speed of nearby traffic and the light level.
At a glance
Class is set by the minimum area of fluorescent background and retroreflective material. Higher class = seen from further away.
Low-risk, off-road — car parks, warehouses away from traffic.
The everyday workhorse — typically a waistcoat or vest.
Maximum visibility — needs sleeves or trouser bands. High-speed roads, night work.
Choosing
No single legal class — it's risk-led. The faster the traffic and poorer the light, the higher the class.
| Environment | Typical class | Why |
|---|---|---|
| Warehouse / yard away from vehicles | Class 1 | Low speed, controlled setting |
| Busy depot, deliveries, car parks with traffic | Class 2 | Moderate speed, mixed foot/vehicle |
| Roadside & highway maintenance | Class 3 | High speed — max distance visibility |
| Night work / low light, any speed | Class 3 | Poor light raises the requirement |
| Railway trackside | Class 3 (orange) | Rail rules mandate orange Class 3 |
The bit people miss
Go deeper
This hub is the overview. Each guide takes one part further — and links back here.
What the standard actually measures — background and tape areas, colours, certification and the wash-cycle limit.
Read the guide →The everyday decision — coverage, when each is required, and a quick decision table by role and environment.
Read the guide →Questions
EN ISO 20471 defines three classes by the minimum area of fluorescent background and retroreflective material. Class 1 is lowest, Class 2 sits in the middle (typically a vest), and Class 3 is highest and normally needs sleeves or trouser bands. Higher class means visibility over greater distance and in worse conditions.
There's no single legal class — it's risk-led. High-speed roads, night work and highway maintenance point to Class 3; busy yards to Class 2; low-risk off-road to Class 1. Some sectors set their own rule — rail mandates orange Class 3.
Yes. Fluorescence fades and tape degrades with washing, UV and wear, so a faded garment can drop below the standard even though it still looks yellow. Garments carry a maximum number of wash cycles — replace worn kit.
EN ISO 20471 Class 1–3 in yellow and orange, with embroidery or print and trade-account ordering.