Safety vests and hi-vis apparel are rated under ANSI/ISEA 107-2020 by Type, which matches the garment to the environment, and Performance Class, which scales the amount of visible material to the risk. Workers in roadway work zones need Class 2 at minimum. Match Type first, Class second, then fit.
That is the two-sentence version we give buyers at CACO America every week. The long version matters, because hi-vis is the one PPE category where the product is judged by a driver doing 60 miles per hour, not by the person wearing it. I have sold safety gear for more than 30 years since joining our family company in 1992, and no category punishes a wrong spec faster than this one.
Why visibility fails, in numbers
Struck-by incidents are climbing, and the federal data is blunt about it. The Bureau of Labor Statistics counted 369 worker deaths from pedestrian incidents involving motorized land vehicles in 2024, up 19.0 percent from 310 in 2023, per the BLS Census of Fatal Occupational Injuries. Within that total, 61 workers were struck and killed by a vehicle in a road work zone, up from 48 the year before.
Read those numbers the way a safety director does. A driver at highway speed covers roughly 90 feet per second. Every foot of extra detection distance a garment buys is reaction time, and the difference between a compliant Class 2 vest and a faded, undersized pullover is measured in exactly those feet. Visibility does not usually fail because a worker wore nothing. It fails because the garment was the wrong class for the speed, the wrong color for the backdrop, or too degraded to reflect.
Decoding ANSI/ISEA 107-2020: Types and Performance Classes
The governing standard is ANSI/ISEA 107-2020, which sets performance criteria for the fluorescent background material, the retroreflective tape, and the design of high-visibility safety apparel. It also added specific criteria for single-use disposable coveralls and a method for measuring a garment's overall nighttime luminance. Two markings on the label tell you everything.
Type answers "what environment."
- Type O, off-road.Workers with no exposure to roadway traffic: warehouses, mines, equipment yards, refineries. Off-road garments carry Performance Class 1.
- Type R, roadway.Workers exposed to traffic or to work vehicles and construction equipment. This is the road crew, utility, survey, and towing market, and it aligns with Performance Class 2 or 3.
- Type P, public safety.Police, fire, and EMS responders at roadway incidents, who need equipment access as much as coverage.
Performance Class answers "how much material." Class 1 carries the least background and retroreflective material. Class 2 adds substantially more of both, and it is the regulatory floor for roadway work zones. Class 3 wraps the most material around the body, including sleeves or pant legs, so the wearer reads as a human form at distance and at night. The standard specifies exact minimum material areas for each class; the figures live in the purchased standard itself, so treat any label claiming a class as a claim you can check against the document.
| Performance Class | Material Coverage | Typical Wearers |
|---|---|---|
| Class 1 (Type O) | Lowest amount of background and retroreflective material | Warehouse staff, parking attendants, equipment yard crews away from traffic |
| Class 2 (Type R or P) | Considerably more background material and tape than Class 1 | Road construction crews, utility workers, surveyors, school crossing guards |
| Class 3 (Type R or P) | Greatest coverage, with material on sleeves or pants defining the full body | Flaggers at night, highway crews near high-speed traffic, emergency responders in low light |
Material coverage descriptions are qualitative; exact square-inch minimums are defined in the ANSI/ISEA 107-2020 standard document.
When each class is required
Here is where buyers get tripped up, because the federal rule moved. FHWA's original Worker Visibility rule at 23 CFR Part 634, effective in 2008, required high-visibility apparel on federal-aid highways. That standalone part has since been absorbed into the Manual on Uniform Traffic Control Devices, so do not go hunting for Part 634 in today's CFR. The obligation lives on in stronger form.
The current requirement is MUTCD 11th Edition, Section 6C.05: for daytime and nighttime activity, all workers within the right-of-way who are within the temporary traffic control zone shall wear high-visibility safety apparel meeting Performance Class 2 or 3 of ANSI/ISEA 107-2015 or equivalent revisions. A person designated by the employer must select the class. For flaggers at night, the MUTCD guidance says Class 3 should be worn. Emergency responders and law enforcement may substitute ANSI/ISEA 207 public safety vests.
Off the highway, OSHA reaches the same place through the General Duty Clause. In an August 2009 letter of interpretation, the agency stated that high-visibility apparel is required to protect workers exposed to the danger of being struck by public and construction traffic in highway work zones. Struck-by hazards also sit in OSHA's construction Focus Four, which is why site-specific policies usually go beyond the legal floor.
Vests vs shirts vs jackets
Once Type and Class are settled, format is the working decision, and it is mostly about climate and workflow.
- Mesh safety vests are the volume item. They layer over anything, breathe in heat, and cost little enough to issue per worker per season. Every buyer should start with a sized run of hi-vis safety vests in both background colors.
- Safety shirts and hi-vis t-shirts solve the compliance problem a vest creates in summer: workers strip layers, and the vest comes off with them. A Class 2 hi-vis safety t-shirt is the garment, so there is nothing extra to forget. Birdseye and moisture-wicking knits carry the tape without trapping heat.
- Jackets and outerwear keep the rating alive in rain and cold. A crew that is compliant in September quietly loses its visibility in November when non-rated coats go over the vests. Cold-weather gear from the broader hi-vis line should carry its own certification so the outermost layer is always the rated layer.
- Breakaway vests deserve a specific word for surveyors, tow operators, and anyone working near equipment that can snag fabric. Breakaway shoulder and side closures release the vest under load instead of dragging the wearer. For crews around rotating machinery or passing mirrors, that release point is a real safety feature, not a convenience.
One crossover check: hi-vis and flame resistance are separate certifications. If the site requires FR clothing, the garment needs both ratings on its label, and an ordinary polyester vest over FR coveralls can undermine the FR program. Spec them together, the way you would check any protective clothing against the full hazard assessment.
Fluorescent yellow-green or orange?
The MUTCD sets the palette: background material shall be fluorescent orange-red, fluorescent yellow-green, or a combination of the two. Within that rule, the choice is about contrast with the backdrop.
Fluorescent yellow-green is the higher-conspicuity pick against most urban and paved backgrounds, and the human eye is most sensitive near its wavelength in daylight. Fluorescent orange separates workers from green vegetation, and many crews use it to distinguish roles, orange for flaggers, yellow-green for the crew, so drivers parse the scene faster. In autumn foliage or against safety-orange equipment, flip the logic. The correct answer is often both, stocked side by side.
Care and retirement: the label is a promise that expires
A hi-vis garment fails gradually and invisibly. Fluorescent dyes fade under UV until the daytime color no longer contrasts, and retroreflective stripes lose brightness as washing, abrasion, and creasing damage the microscopic elements that return light. A vest can look acceptable on a shelf and still be far below its rated performance at night.
Practical retirement rules we give accounts:
- Follow the manufacturer's stated maximum wash count and care instructions; the certification assumes them.
- Wash-count guidance varies by maker and fabric, so log issue dates and treat heavily laundered garments as expired even if intact.
- Retire immediately on tears, fraying tape, heavy soiling that will not wash out, or fading you can see next to a new garment. A side-by-side check against fresh stock is the fastest field audit there is.
- Check the printed ANSI/ISEA 107-2020 labelbefore buying. A genuine label states the standard edition, Type, and Performance Class. Garments that are missing it, or that carry a vague "high visibility" claim with no class, do not belong in a compliance program.
For distributors: hi-vis is a repeat-purchase category
Now the part I discuss with our distributor partners in more than 38 countries. Hi-vis is compliance-driven consumption. Regulations put a garment on every worker in the right-of-way, and fading, laundering, and site turnover retire that garment on a short cycle. Few PPE lines reorder as predictably.
How to stock it well:
- Go deep on sizes, not just styles.The OSHA construction fit rule at 29 CFR 1926.95(c) requires PPE to be selected so it properly fits each affected employee. A men's medium cinched on a smaller worker or draped on a larger one is a fit failure, and since the 2024 rule update, it is a citable one. Carry S through 4XL and women's-fit cuts as standard, not specials.
- Cover both colors and the big three formats.Vests for volume, shirts for summer, rated outerwear for winter, in yellow-green and orange.
- Stock the adjacent rated garments.Hi-vis industrial coveralls and disposable options serve the utility, rail, and plant-turnaround accounts that vests alone miss.
- Sell the audit.Walk an account's crew with a new vest in hand, compare, and quote the swap-outs. It is the same standards-first conversation we outlined in our guide to navigating the safety gear market, and it converts because the fade is visible once you show it.
At CACO America we back that program with the GE-branded PPE line we hold the license for across the Americas and the Caribbean, alongside the first license for WD-40 branded microfiber towels. Hi-vis apparel also anchors the visibility trend we flagged in our 2026 industry outlook.
"In thirty years I have never had a customer regret stocking too many sizes of a Class 2 vest. I have watched plenty regret the pallet of one-size-fits-all. Fit is the difference between a garment that gets worn and a garment that hangs on the gate." - Joel Abbo, CEO, Caco Abbo Group
Frequently Asked Questions
1. What class of safety vest do road construction workers need?
Workers within the right-of-way in a temporary traffic control zone must wear apparel meeting ANSI/ISEA 107 Performance Class 2 or 3 under MUTCD Section 6C.05. A person designated by the employer selects the class. For nighttime flagging, MUTCD guidance says Class 3 should be worn because it defines the full body in headlights.
2. What is the difference between Type O, Type R, and Type P hi-vis?
Type is the environment rating in ANSI/ISEA 107. Type O covers off-road workers with no traffic exposure, such as warehouse and yard crews, at Class 1. Type R covers roadway workers exposed to traffic or work vehicles at Class 2 or 3. Type P covers public safety responders who need equipment access along with visibility.
3. Are hi-vis shirts as compliant as safety vests?
Yes, if the shirt itself is certified. Compliance follows the garment's label, not its format, so a shirt marked ANSI/ISEA 107 Performance Class 2 meets the same requirement as a Class 2 vest. Shirts help summer compliance because the rated garment cannot be shed separately. Confirm the printed Type and Class before treating any shirt as PPE.
4. Should I choose fluorescent yellow-green or orange hi-vis?
Both colors are permitted; the MUTCD specifies fluorescent orange-red, fluorescent yellow-green, or a combination. Yellow-green generally stands out best against paved, urban backdrops, while orange separates workers from vegetation and lets crews color-code roles, such as orange for flaggers. Match the color to the backdrop your crew actually works against, and stock both.
5. How often should safety vests be replaced?
There is no universal expiration date, so follow the manufacturer's care and wash-count guidance and inspect on a schedule. Retire a garment when the fluorescent color has visibly faded, the retroreflective tape is cracked, worn, or dull, the fabric is torn, or soiling will not wash out. Comparing against a brand-new vest is the quickest field test.
6. Do safety vests need to be flame resistant?
Not by default. High-visibility certification and flame resistance are separate ratings, and standard polyester hi-vis will burn. Sites with arc flash, hot work, or flammable atmospheres need garments certified for both, stated on the label. Wearing a non-FR vest over FR clothing can compromise the protection, so spec the whole layered system together.
7. What does the 1926.95(c) fit rule mean for hi-vis programs?
OSHA's construction PPE standard, 29 CFR 1926.95(c), requires equipment that is of safe design and selected to properly fit each affected employee. For hi-vis, that means sized garments, including women's-fit cuts, rather than universal sizing. A vest that hangs loose or rides up exposes gaps in coverage and fails the standard even though it is technically present.
Stock hi-vis the compliant way
If you distribute PPE, hi-vis apparel is the steadiest reorder line you can carry, and CACO America can help you build the size runs, color mix, and class coverage your accounts need. Apply through our distributor program for pricing and support, or browse the full catalog to see the range. Send us your toughest spec question while you are at it. After three decades in this business, we have probably answered it before.
