ANSI Class 2 vs Class 3: What's the Difference?

Class 2 and Class 3 are the two high-visibility classes most US sites specify, and the difference is not just a label on a vest. It changes how much fluorescent background and reflective tape a garment carries, which garments you need to buy, and what your crew can wear together as a compliant outfit.

The short answer

Class 2 is built for workers near traffic moving under about 25 mph and in relatively simple visual environments. Class 3 is for higher speeds, night work, poor lighting and complex backgrounds where a worker must be recognized from further away.

If your site plan says “Class 3 for flaggers, Class 2 for everyone else”, that is a typical and sensible split. If it says “Class 3 everywhere”, check whether sleeved garments are actually required, because that changes your uniform program significantly.

The numbers behind the classes

ANSI/ISEA 107-2020 sets minimum areas of visible material:

The jump from Class 2 to Class 3 is roughly a 60% increase in visible material. That is why a Class 2 vest cannot simply be “upgraded” with a strip of tape: the garment has to be designed and certified to the higher area requirement.

When Class 2 is enough

• Road crews working near slow-moving traffic or in closed work zones
• General construction site workers behind barriers
• Warehouse and loading dock staff
• Event staff and parking attendants
• Visitors and inspectors

Class 2 vests, short-sleeve shirts and hoodies are the workhorses of these programs. They are lighter, cheaper and easier to layer than Class 3 garments.

When to specify Class 3

• Flaggers and traffic control personnel
• Night work and dawn/dusk shifts
• Highways with traffic above 50 mph
• Complex backgrounds such as equipment yards or rail
• Workers who need to be seen from a distance by machine operators

Class 3 garments typically include sleeves with tape, which is also why they are warmer and more expensive. For summer, a Class 3 short-sleeve shirt with taped sleeves is a common compromise.

Sleeves change the class

One detail often missed in purchasing: a Class 2 vest worn over a long-sleeve shirt is still Class 2 unless the sleeves are taped and the combination is certified. Many suppliers offer “Class 3 when sleeves are down” shirts and jackets, where the taped sleeves raise the visible area into Class 3 territory.

If your crew works with sleeves rolled up in summer, verify whether the rolled-up configuration remains compliant, or buy a Class 3 short-sleeve design rated as such.

Cost and inventory implications

Class 3 garments use more fabric and tape, so they cost more per unit. Programs often standardize on Class 2 for the majority and issue Class 3 vests or jackets for specific roles. That reduces cost and keeps a single base uniform across the site.

If you distribute workwear, stock Class 2 first — it covers the widest range of buyers — and keep a smaller Class 3 range for flagging, rail and night-work customers.

How to verify compliance

1. Check the garment label for “ANSI/ISEA 107” and the class.
2. Ask for test reports for the specific style and tape.
3. Confirm the tape layout matches the certified sample.
4. Check that the garment is worn as designed: a vest under a jacket is not visible.

Bottom line

Choose Class 2 for most site workers and Class 3 for high-speed, night and complex-visibility roles. Buy from a supplier who can show the certification for the exact style, and design your uniform so sleeves, jackets and trousers work together as a compliant system rather than as isolated pieces.

If you are standardizing a program, our hi-vis range covers both classes in vests, shirts, jackets and rain gear, with test reports supplied per order.