PPE/Specific/TBT-PPE-028

Hi-Vis Clothing Standards and Classes

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High-visibility clothing is mandatory on virtually every UK construction site and is the primary means of making pedestrians visible to plant operators and vehicle drivers. However, not all hi-vis is equal. Different classes provide different levels of visibility, and worn, dirty, or faded garments offer significantly reduced protection. This talk explains the hi-vis standards and classes and why keeping your hi-vis in good condition matters.

Key Hazards

Pedestrians struck by plant when wearing inadequate or dirty hi-vis

Reduced night-time visibility from garments with worn retroreflective strips

Workers blending into background colours when hi-vis class is too low

Non-compliant garments providing a false sense of being visible to operators

Control Measures

Wear the hi-vis class required by the site rules: typically Class 2 minimum, Class 3 for highway work.
Ensure garments display the CE or UKCA mark and comply with BS EN ISO 20471.
Replace hi-vis clothing when the fluorescent material is faded, stained, or discoloured.
Replace garments when retroreflective strips are damaged, peeling, or no longer reflective.
Wear hi-vis that contrasts with the background: orange or yellow depending on site conditions.
Ensure hi-vis is worn as the outermost layer so it is not concealed by jackets or coats.
Keep hi-vis clean by washing regularly according to the manufacturer's care instructions.
Use hi-vis trousers or leg bands in addition to vests where the risk assessment requires it.
Brief all operatives on the site-specific hi-vis requirements during induction.

Remember

Wear the hi-vis class required by site rules, typically Class 2 minimum on construction sites
Replace garments when fluorescent colour is faded or retroreflective strips are damaged
Hi-vis must always be worn as the outermost layer so it is fully visible to others
Keep hi-vis clean; dirty or stained garments have significantly reduced visibility
Hi-vis clothing must display the CE or UKCA mark and comply with BS EN ISO 20471

Applicable Legislation: Personal Protective Equipment at Work Regulations 1992 · BS EN ISO 20471 (High Visibility Clothing) · CDM 2015 · Traffic Signs Manual Chapter 8

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