At the lights this week on the road into Sri Aman, your front wheel sits a metre from the closed passenger window of the car beside you. You are both breathing the same smoke — the air that pushed the town's API reading to 215 at 4pm on 28 August, the worst in Sarawak that afternoon. No helmet sold today carries a filtration rating, because no helmet standard asks for one. The filter behind that car's dashboard was tested to a published international standard, particle size by particle size, down to 0.3 microns. Your helmet's vents were tested too — for whether they snag on tarmac and lever your head during a slide.
The short version
- Car cabin air filters are tested to ISO/TS 11155-1, which requires a stated fractional filtration efficiency for particles larger than 0.3 microns, plus initial pressure loss and dust-holding capacity (ISO).
- A standard cabin filter runs about 98% efficient in the 5 to 100 micron range, while a premium HEPA cabin filter reaches 99.97% at 0.3 microns (AAA).
- ECE 22.06 tests helmet vents as structural projections — whether they catch or shear during an impact. Ventilation performance is not regulated, and no filtration clause exists (SHARP / DfT).
- Sri Aman recorded API 215 at 4pm on 28 August 2026, the worst reading in Sarawak that afternoon, on a day 18 areas across Malaysia logged unhealthy air (Borneo Post; Malay Mail).
- Indonesia had logged more than 154,000 fire hotspots by 11 August 2026; at the comparable late-July point the count was 96,000, against roughly 88,000 in 2019 and 58,000 in 2023 (Mongabay).
Is There a Motorcycle Helmet With a Respirator, or Isn't There?
There are helmets with fans, filters and cartridges bolted to them, and there are aftermarket units that clip on. What there is not — anywhere on the market — is a helmet whose filtration you can read off a spec sheet the way you read a cabin filter's. The difference is not marketing. It is that one product category is governed by a test standard that forces a number, and the other is governed by a standard that never asked the question.
That distinction is the whole answer to "is there a motorcycle helmet with a respirator". You can buy filtration for your head. You cannot yet buy certified filtration for your head, because there is no certificate to issue.
Two Filters, Two Rulebooks: How the Car Got a Spec and the Helmet Got a Sticker
ISO/TS 11155-1, first published in 2001, and its European parallel DIN 71460-1 set out how a passenger-compartment air filter is tested. The method requires three declared outputs: fractional filtration efficiency for particles larger than 0.3 microns, initial pressure loss across the media, and accelerated dust-holding capacity against a standardised synthetic test dust.
Those three numbers matter because they trade against each other. Push the efficiency up and the pressure drop follows; a filter that captures beautifully and passes no air is a blocked duct, not a filter. Forcing a manufacturer to publish both is what stops the trade-off being hidden.
Now look at the helmet. ECE 22.06, the current European standard, treats vents as structural projections. Protruding elements must not present rigid projections that could catch during an impact; they have to flex or shear cleanly. Vent apertures were brought into the standard as impact points to be struck during testing. Ventilation performance — how much air moves, how fast, carrying what — is not in scope at all.
So the car industry decided a quarter of a century ago that the air arriving at a person's lungs was a measurable engineering property. The helmet industry never had that conversation, because a helmet was defined as impact protection and the definition was never widened.
The same air, three barriers, one spec sheet
Pick a barrier. The readout shows what its governing standard actually obliges it to state.
| Barrier | Governing standard | What the standard measures | Rated efficiency | Rated at particle size |
|---|---|---|---|---|
| Standard car cabin filter | ISO/TS 11155-1 / DIN 71460-1 | Fractional efficiency, pressure loss, dust-holding capacity | About 98% | 5 to 100 microns |
| Premium HEPA cabin filter | ISO/TS 11155-1 / DIN 71460-1 | Fractional efficiency, pressure loss, dust-holding capacity | 99.97% | 0.3 microns |
| Motorcycle helmet vents | ECE 22.06 | Whether the projection snags or shears in an impact | Not specified | Not specified |
Your Vents Are Certified. Certified Not to Cut You.
Read the ECE 22.06 vent clause on its own terms and it is a reasonable piece of engineering. A vent scoop that digs into tarmac and levers a helmet is a real mechanism for a real neck injury, and testing for it is right.
The problem is that this is the only question ever asked of the one opening in the shell through which a rider draws every breath. The air path is regulated as a snag hazard. Not badly regulated — regulated for something else entirely.
This is also why helmet reviews read the way they do. "Great ventilation" is a subjective comfort judgement written by someone who wore the thing for a week. "98% at 5 microns" is a test result. One of those can be compared across products and one cannot, and the difference is entirely down to whether a standard demanded a number.
Scale is what makes the gap bite. PM2.5 is, by definition, 2.5 microns and smaller. A standard cabin filter's rated band starts at 5 microns — already above the fraction that matters most — which is why the premium HEPA cabin filter, rated at 0.3 microns, is the only barrier in this comparison genuinely sized for the particles in a haze event. A helmet vent mesh is sized to keep out a wasp. Three barriers, three orders of magnitude apart, and only two of them have ever been measured.
In Sri Aman this week the ambient load is dominated by fine smoke aerosol from peat and land fires. That is precisely the fraction the coarse cabin filter misses, the fraction the vent mesh was never built to touch, and the fraction the premium cabin filter was designed for. We covered how those same cabin-filter figures compare with a helmet in do motorcycle helmets have air filters; this post is about why one of them has a number at all.
Why the vent was never a filter
Illustrative side view — not measured data.
Projecting the Gap: More Riders, Longer Seasons, Same Blank Spec Sheet
The ASEAN two-wheeler rental market alone is forecast to grow from USD 2.04 billion in 2026 to USD 2.74 billion by 2031 — about 6% a year compounded across those endpoints — on top of a Southeast Asian two-wheeler market growing at roughly 3.03% a year.
At the same time, Indonesia's fire season is running hot. FireWatch had recorded more than 154,000 hotspots by 11 August 2026; at the comparable late-July point the count was 96,000, against roughly 88,000 in 2019 and 58,000 in 2023 — so about 1.7 times the 2023 figure at the same stage of the season. Burned area rose eightfold between June and July, from 15,474 to 124,040 hectares.
Put those together and you get a projection — and it is a projection, not a measurement. On current trajectories, by 2031 there will be materially more two-wheeler riders in Southeast Asia, facing fire seasons heavier than the ones that produced this month's readings, and unless a standards body extends a helmet regulation to cover the air path, not one of them will be able to read a filtration figure off the helmet they are legally required to wear. Nothing in the current standards pipeline closes that gap.
What a Rider Can Actually Specify Today
The honest position is that no helmet standard covers filtration, so a rider cannot buy certification. What a rider can buy is a specified filter element and a delivery path that does not depend on how fast they happen to be going.
That is what Easi Breezi is: a modular unit that clips onto the helmet you already own, drawing air through an H11 HEPA element rated at ≥95% capture of PM2.5, driven by a fan powered from the bike itself rather than from forward speed. It is IP67 rated and Patent Pending, it ships from the start of September, and it costs $199.00. If you want the reasoning behind the filter grade, we set it out in HEPA filter for a motorcycle helmet: H11 vs H13 vs carbon, and replacement media comes in a 10x HEPA filter pack.
A stated grade in the size class that matters is not a certificate. It is, however, the thing your vents have never had.
Frequently Asked Questions
Do motorcycle helmets come with air filters?
Almost none do. A small number of specialist and aftermarket products add a filter element, but a conventional helmet's vents are open apertures with at most a coarse mesh. Because ECE 22.06 contains no filtration clause, a manufacturer fitting a filter has no standard test to certify it against.
Do motorcycle helmets have ventilation?
Most modern full-face helmets do, in the form of intake and exhaust vents that use the pressure difference created by forward motion. What they do not have is a regulated ventilation performance figure — ECE 22.06 tests the vent as a structural projection that must not snag during an impact, not as an airway.
What motorcycle helmet has the best ventilation?
There is no defensible answer to this, and that is precisely the point of this article. Without a test standard requiring a stated airflow or filtration figure, every ranking of helmet ventilation is a subjective comfort judgement rather than a comparison of published numbers.
How do you test a HEPA filter?
Filter media is tested by challenging it with a controlled aerosol and measuring what fraction penetrates at a defined particle size — the basis of the 0.3 micron figures quoted for HEPA-grade media. Cabin filters for cars are tested under ISO/TS 11155-1, which additionally requires pressure loss and dust-holding capacity to be reported.
Ready to Breathe Cleaner on Every Ride?
The car beside you in the haze has a filter with a test method, a rated particle size and a published efficiency. Your helmet has vents with a snag test. Until a standards body closes that gap, the only thing a rider can do is specify the filter themselves.
Easi Breezi clips an H11 HEPA path onto the helmet you already ride in, powered from the bike. Pre-order the EB unit — shipping starts in September.
Written by Ash — mechanical engineer and founder of Easi Breezi, building an active HEPA filtration system for motorcycle helmets (patent pending). Based between Hong Kong and Bali, riding daily in the traffic this blog writes about.