Do You Need Class 2 Trousers?
- 7 days ago
- 3 min read
Understanding where compliance really matters
One of the most common questions we’re asked is:
“Do you sell ISO 20471 Class 2 trousers?”
Whilst it’s a fair question, it’s usually based on a misunderstanding.
Where the confusion comes from:
Chapter 8 of Traffic & Signs Manual incorrectly references “class 2 reflective material” which was last relevant in a standard (EN 471) that was superseded 13 years ago.
This has been confused with class 2 garments, referring to the overall amount of fluorescent and reflective material on a product.
It’s easy to see how the two get mixed up, but they are not the same thing.
How garment classification actually works:
ISO 20471 defines three garment classes:
Class 1 – lowest level of visibility in the standard
Class 2 – intermediate
Class 3 – highest level
These are based on a balance of fluorescent fabric and reflective tape, not just one or the other.
Crucially, the standard is designed around the visibility of the human body as a whole, not individual garments in isolation.
Start with the upper body
Visibility is driven primarily by the upper body.
Why?
It’s the most consistently visible part of the wearer
It remains visible above obstructions (vehicles, barriers, trenches)
It plays the biggest role in recognition of the human form
This is reflected in both:
ISO 20471 design principles
UK guidance such as Chapter 8 of the Traffic Signs Manual and The Red Book.
In practice, this means:
Your first priority should always be a Class 2 or Class 3 upper garment.
Where trousers fit in
Trousers are typically Class 1 garments, and in most cases, that is entirely appropriate.
When worn together:
A Class 2 or Class 3 upper garment
Plus a Class 1 trouser
Combine to achieve overall Class 3 conformance.
This is a key point that is often overlooked. ISO 20471 allows for a combination of garments (or ensemble) to be worn together to meet the highest classification (if the assembly meets the minimum requirement).
And importantly:
You cannot exceed Class 3 overall; there is no additional safety benefit in trying to “over-class” individual items beyond what is required.
Why Class 2 trousers are rarely needed
To achieve Class 2 on a trouser alone, you need to significantly increase:
Fluorescent fabric coverage
Reflective tape area
This often results in:
Additional bands of tape
Reduced flexibility in design
Potential compromises elsewhere (e.g. comfort, weight, practicality)
But in most real-world scenarios, this extra material does not meaningfully improve visibility, because:
The upper body is already delivering the required conspicuity
The overall system (upper + lower) already meets Class 3
So the question becomes:
Is more always better, or is it about the right design?
The importance of placement, not just quantity
As discussed in our Better with Braces article, visibility is not just about adding more tape.
It’s about:
Positioning
Recognition of the human form
Visibility in real working conditions
Adding tape to the legs does not compensate for:
Missing upper-body visibility
Poor garment configuration
Lack of features like shoulder braces
When Class 2 trousers
are specified
There are exceptions.
For example, within rail infrastructure, the Network Rail PPE Standard NR/L2/OHS/021 includes requirements that can lead to the specification of Class 2 overtrousers in certain conditions.
This is why products like our breathable Instow (L02) trouser in orange include:
A third band of reflective tape on the leg
Conformance to Class 2 as a standalone garment
These are designed to meet specific infrastructure requirements in addition to general industry use.
A practical approach to compliance
In most applications, Leo would recommend that the most effective setup is:
Class 3 upper garment with full shoulder braces
Class 1 trouser
As this combination:
Meets ISO 20471 Class 3 overall
Aligns with Chapter 8 regulations
Delivers optimal visibility where it matters most
To conclude, High-visibility clothing isn’t about chasing the highest number on every garment.
It’s about understanding how visibility works in the real world. Start with the upper body, then build from there, focusing on effective design, not excess material.
Applying the standards correctly takes real expertise, which is why choosing a brand with the knowledge and experience that you can trust in is essential to keeping workforces safe.
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