How to Choose the Right Hi-Vis Class for Your Job (Class 1, 2, 3 Explained)
by Haris on Sep 15, 2026
If you've ever looked at hi-vis workwear and seen "Class 1," "Class 2," or "Class 3" listed without much explanation, you're not alone — most people buying hi-vis for the first time have no idea what the classes actually mean, or which one applies to their job. Getting it wrong isn't just a compliance issue; it can mean you're genuinely less visible in situations where visibility is the entire point.
This guide explains what each class means, how they're worked out, and how to pick the right one for your specific line of work.
What "Class" Actually Means
Hi-vis classes come from the EN ISO 20471 standard, and they're based on the amount and placement of two materials:
- Background material — the fluorescent fabric itself (orange, yellow, or red)
- Retroreflective material — the reflective tape that bounces light back, especially important in low light or at night
The more of both materials a garment has, and the more of the body it covers, the higher the class. It's not about brand, price, or how bright something looks to the eye — it's a measured, tested standard.
Class 1: The Minimum Level
Class 1 is the lowest level of visibility covered by the standard. It requires the smallest amount of background and reflective material, and is typically seen in items like:
- Sashes
- Armbands
- Some trousers (when paired with a higher-class top)
Who it's for: Class 1 is generally only suitable for low-risk environments — away from moving traffic or heavy machinery, in daylight, low-speed settings. It's rarely used as someone's only form of hi-vis; it's more common as a supplementary item paired with a higher-class garment elsewhere on the body.
Class 2: The Common Mid-Level
Class 2 requires roughly double the background and reflective material of Class 1, and is one of the most commonly issued levels for general site work. Typical Class 2 items include:
- Vests
- Some t-shirts and polo shirts (when combined with other garments)
Who it's for: Class 2 suits moderate-risk environments — general warehouse work, some site roles, situations with limited vehicle movement, or where you're working alongside a colleague already in higher-class protection.
Class 3: The Highest Level
Class 3 is the highest classification and requires the most background and reflective material, along with sleeves — this is a key distinction, since a sleeveless vest, no matter how much tape it has, cannot be certified Class 3. Full coverage of the torso and arms is required. Typical Class 3 items include:
Who it's for: Class 3 is required for the highest-risk environments — roadworks, trackside work, construction sites with moving vehicles or heavy plant machinery, and any role where you need to be visible from a distance, in poor light, or from multiple angles including the arms.
How to Know Which Class Your Job Requires
This isn't usually left to personal judgement — most workplaces have this specified through a risk assessment, often set by:
-
- Your employer's health and safety policy
- The site or client's specific requirements (many construction sites mandate Class 3 regardless of role)
- Industry-specific regulations (rail and highways work almost always requires Class 3)
If you're self-employed or your class isn't explicitly stated, a simple rule of thumb: the closer you work to moving vehicles, heavy machinery, or low-light conditions, the higher the class you need. When in doubt, Class 3 covers you for the widest range of situations.
Can You Combine Garments to Reach a Higher Class?
Yes — this is a common and compliant approach. For example, a Class 2 vest worn over Class 1 trousers can, combined, provide coverage that satisfies certain job requirements, since the standard accounts for total visible material across the whole outfit, not just a single garment. However, always check the specific combination meets the actual class required for your role — don't assume that layering automatically adds up to full Class 3 coverage unless it's been specifically designed and labelled to do so.
Common Mistakes
- Assuming brighter = higher class — visual brightness isn't the measure; it's the certified amount and placement of material
- Wearing a sleeveless item for a job that requires arm visibility — Class 3 specifically requires sleeves, so a vest alone can never meet it, no matter how much tape is added
- Buying based on price rather than checking the class label — cheaper hi-vis sometimes skips proper certification testing entirely, meaning the class listed may not be accurately verified
