A modular, or flip-up, helmet lets you raise the whole chin bar like an open-face helmet and lower it to ride as a full-face. This guide sets out the modular helmet pros and cons, what the P, J and P/J labels mean under the European ECE 22.06 standard, how to judge the chin bar lock, and who should choose a modular over a full-face for touring in hot countries.
Quick answer
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- Is it safe: it depends on the model. With the chin bar closed and locked it is tested as a full-face helmet; the extra weak point is the chin bar lock.
- The key label: under ECE 22.06, only a P/J helmet may be used both closed and open. Without P/J, ride only with the chin bar closed.
- Pros: easier on and off with glasses, talking and drinking at stops without removing the helmet, more air while waiting at lights.
- Cons: the hinge and lock usually add weight, an extra seam, and one more part that can fail.
How a modular helmet works
The chin bar is attached to the shell by hinges on each side and locks down with a latch at the front. Press the release and the chin bar swings up together with the visor. When you lower it, listen for the click and pull down on the chin bar to make sure it has locked.
Since the difference lies in this mechanism, the general rules for choosing a helmet still apply: the right size, a clear approval label, and no fakes. See helmet types and standards and the helmet sizing guide.
Pros: glasses, talking, airflow at stops
- Glasses wearers: flip the chin bar up and put the helmet on without taking your glasses off, unlike a full-face.
- Quick stops: ask directions, pay for fuel, drink or chat without removing the helmet and undoing the strap.
- Air when stationary: at red lights or in traffic under the sun, opening the chin bar helps. Close it again before moving off, unless the helmet is P/J.
- While riding: the closed chin bar covers your chin like a full-face, which an open-face helmet cannot do.
Cons: weight, chin bar mechanism, seams
- Weight: the hinges and lock usually make a modular heavier than a full-face in the same range. Compare the weights the makers publish and wear the helmet for a while before buying.
- The chin bar lock: a part a full-face does not have. According to SHARP, the UK Department for Transport helmet rating scheme, the standards do not require the lock to be checked during impact testing, and the risk of injury increases with lower latch reliability.
- Seams and noise: the joint between chin bar and shell can let in draughts; noise varies a lot between models.
- Maintenance: dust and sand can make the lock stick; if the lock is loose or does not engage firmly, do not ride with that helmet.
P/J homologation under ECE 22.06
According to Dainese’s explanation of ECE 22.06 (published 29 August 2025), P stands for “protective”, meaning the full-face configuration, and J for “jet”, the open-face configuration. A P/J modular can be used both closed and open; to earn P/J the helmet must pass both series of tests, with the chin bar staying closed or open in the respective tests. RideApart adds that if a helmet fails, the chin bar is marked as non-protective.
The UK government’s helmet safety guidance (updated 22 July 2025) says a helmet with a non-protective lower face cover should carry the words “Does not protect chin from impacts” and/or the matching symbol. If you see that text, do not treat the chin bar as chin protection.
SHARP latch score: for flip-front helmets, SHARP publishes the percentage of impacts in which the lower face guard stayed fully locked. SHARP’s own example: if it opened on nine occasions, the score would be 70%. The score is not factored into the star rating, so look at both numbers if the model you are considering has been tested.
In Vietnam: we have not verified whether the national helmet regulation QCVN 2:2021/BKHCN has specific rules for modular helmets, so this article makes no claim. The safe approach: if the label does not clearly show P/J, ride only with the chin bar closed and locked.
Modular helmets in hot climates
In hot countries the main gain of a modular comes when you are stationary: chin bar up at lights, at drink stops, when asking the way. On the move, cooling depends mostly on each model’s vents, not on opening the chin bar.
- Do not ride with the chin bar open unless the helmet is P/J; even on a P/J helmet, an open chin bar does not cover your chin.
- Check the lock every time you close it: opening and closing many times a day makes this step easy to forget.
- Keep the lock clean: wipe dust from the latch after dirt-road days.
If you want a modular helmet when renting from Mr Tú – Old Quarter Motorbike Rental, ask when you book which helmets are available, or bring your own. How to spot a poor-quality helmet is covered in spotting fake and unsafe helmets.
Who should choose modular or full-face
| Situation | Choose | Why |
|---|---|---|
| You wear glasses, stop often for photos or directions | Modular | Easier to put on, take off and talk |
| Long stints in the saddle with few stops | Full-face | Usually lighter, no chin bar lock |
| You want to ride slowly with the chin bar open | Only a P/J helmet | A non-P/J helmet is only tested closed |
| Dusty roads, little helmet maintenance | Full-face | Fewer moving parts to keep clean |
Frequently asked questions
Is a modular helmet as safe as a full-face?
With the chin bar closed and locked, it is tested as a full-face. The difference is the lock; SHARP notes that injury risk rises as latch reliability falls, so check the latch score if SHARP has tested the model.
Can I ride with the chin bar of a modular helmet open?
Under ECE 22.06, only a helmet with the P/J label may be used in both configurations. Without P/J, ride only with the chin bar closed.
What does P/J mean on a helmet label?
P is the full-face configuration with chin protection and J the open-face configuration. P/J means the helmet has passed the tests in both.
Should glasses wearers choose a modular helmet?
Often yes, because you can put the helmet on and take it off without removing your glasses. Still check that the frames do not press on your temples on a long ride.
Sources, checked on 12 November 2026: Dainese, how ECE 22.06 homologation works (29 August 2025); RideApart, ECE 22.06 explained; GOV.UK, motorcycle helmets, visors and goggles (updated 22 July 2025); SHARP, testing and latch score.
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