The Dainese D-Air Smart Air is proof that airbag protection doesn’t have to be awkward, bulky or tied to a subscription.
It’s a low-profile electronic vest that can be worn under or over a motorcycle jacket, using built-in sensors to monitor the ride and detect crash scenarios. If the system decides things have gone badly wrong, it inflates an air chamber covering the chest, shoulders and central back.
Protection is the big draw, but the best thing about the Smart Air is how easily it fits into normal riding life. After thousands of miles of use, it has felt less like a complicated safety device and more like another piece of riding kit.
It’s self-contained, so there’s no tether to clip to the bike, and it’s a one-off purchase rather than a subscription system. At a list price of £599, it’s not cheap, but compared with subscription airbags the numbers become favourable after a couple of years.
Also, there’s a promotion at the time of writing (July 2026) that brings the price down to £459 and makes it a more attractive proposition.
Fit & comfort
The Smart Air is a lightweight vest with stretchy side panels and an expansion zip. Each size effectively covers two fits, for example small when the expansion is zipped and medium when it’s open. The sizing is a little optimistic, though. The medium-large I tested feels more like a small-medium.
The best approach is to choose a size that fits properly over a light mid-layer with the expansion panel closed. Opening the panel should then give enough room to wear it over a lightweight motorcycle jacket.
Wearing it under a jacket is possible, but it’s more demanding. Unless the jacket is already loose, it will probably need to be a size larger than usual. That’s partly to leave space for inflation, but also because the raised hump on the back, which houses the electronics and inflator, takes up room.
Photography: Helen Meeds
In use, wearing the Smart Air over a jacket worked best. It avoided the jacket riding up around the throat and made it easier to see the status lights.
The main weather caveat is that the electronics should not get wet. If the airbag is worn over a jacket in rain, it needs a waterproof layer over the top.
Ease of use
Once set up, the Smart Air is straightforward, but the first steps could be clearer. The supplied printed manual is harder to follow than it should be, and Dainese’s downloadable manual is a better guide.
Charging is through a USB-C port at the base of the rear hump. The port is slightly fiddly to reach, but it’s manageable.
The system switches on when the collar press-stud is fastened after zipping up the vest. Undoing the stud switches it off. The stud only needs to make contact for the system to wake up, and a security ribbon prevents the two halves touching accidentally when it’s meant to be off.
Dainese advise leaving the airbag switched off until you’re on the bike and ready to ride. That makes sense, but it does create the risk of forgetting to switch it on. After doing that a few times, I decided to fasten it while getting kitted up and accept the small risk of off-bike activation.
A haptic buzz confirms the system has powered up and it should then display a blue LED, which means standby, not fully armed. The airbag arms when it detects engine vibration or once you’re moving at 10km (6.2mph). Once armed, the LED turns green.
The collar fastener is the biggest usability niggle. It sits over the zip puller, making it awkward to press shut. If the stud makes contact before it clicks together properly, the system can buzz, power down, then buzz again when contact is made a second time. A short delay before powering up would make it feel neater.
Safety certification
The Smart Air’s protection is strong. Airbag protection is tested in a similar way to conventional CE armour, with a weight dropped onto the protector and sensors measuring the force transmitted through it. For comparison a passive limb protector must not allow more than 20 kilonewtons through to achieve a Level 2 pass. For a back protector, it’s nine kilonewtons or less to get L2.
For motorcycle airbags, the Level 2 threshold is much tougher - just 2.5 kilonewtons. The Dainese D-Air Smart Air meets that Level 2 standard, which makes the protective benefit very hard to ignore.
Deployment & protection
The vest contains the airbag, electronics and gas inflator. When the system detects a crash scenario, the inflator fills the airbag chamber to protect the chest, shoulders and central back.
In road mode, the Smart Air protects against hitting obstacles, lowside crashes, highside crashes and impacts from other vehicles. There is also an off-road mode, though that does not include protection against being hit by another vehicle.
One important detail is how the system behaves while stationary. In normal road mode, it relies on engine vibration or movement to stay armed. Some bikes may not vibrate enough to keep it armed while waiting at traffic lights, which could leave the rider unprotected if hit from behind.
EV mode solves that by keeping the system armed from switch-on to switch-off. The trade-off is that you need to remember to switch it off when you’re no longer riding.
The Smart Air doesn’t offer the enormous coverage area of something like the Motoairbag V4, which has larger front and rear airbags, and which we reviewed here. But the Dainese option is easier to fit into everyday riding.
Durability and maintenance
The airbag is rated for three deployments before the airbag component within the vest needs replacing. After a deployment, replacement inflators are available and can be fitted by the owner. At the time of review, an inflator costs £109.
If the airbag itself needs replacement, the vest has to go back to the Dainese importer. The quoted turnaround is around two weeks, with a cost of £240 at the time of review.
Battery life is good enough for most riding, though not quite as strong as Dainese claim. Dainese say the battery should last 18 hours, but real-world use suggests more like 10-12 hours.
That was still enough for full riding days, including touring in Europe, provided charging became part of the evening routine. Riders doing very long days may need to top up during breaks.
Photography: Helen Meeds
The vest can be charged from a portable power bank. A 30-minute charge raised the battery on our vest from 22% to 33%, which should be enough for roughly another 60-90 minutes of riding.
The low-battery warning could be better. The front LED warns by changing its flash pattern, but there’s no haptic warning. If the vest is worn under a jacket, the rider cannot see the light, and when the battery runs out the system simply shuts down with no warning.
Real-world use
The Smart Air has proved reassuring rather than intrusive. It can be put on, fastened and largely forgotten about, which is exactly what a good airbag system needs to achieve.
Wearing it over a jacket worked best for me in day-to-day use. It made the lights visible, avoided the fit problems that came with wearing it underneath, and kept the system easy to check while learning how it behaved.
There are still things to keep on top of. Charging matters and mode selection matters. Riders who spend a lot of time at traffic lights should understand whether road mode keeps the vest armed on their bike, or whether EV mode is a better choice.
But none of those points feel like deal-breakers. They’re small compromises in exchange for a major improvement in protection.
Conclusion
The Dainese D-Air Smart Air is not perfect, but it is one of the easiest airbag systems to live with.
The fastener could be better, the low-battery warning should be easier to notice, and the sizing needs a little care. Larger riders will struggle to find an option to fit, as the biggest size is realistically an L-XL (though it’s listed as XL-2XL).
It also doesn’t cover the same amount of the body as some bulkier airbag systems.
But its strengths are important. It’s self-contained, subscription-free, comfortable for regular use and offers serious certified protection. Most of the time it just sits there quietly, ready for a normal ride to turn into a bad one.
That’s the real achievement. The Dainese D-Air Smart Air makes riding feel safer without spoiling the ride.
