Dainese's D-Air system inflates a U-shaped collar bag plus chest and shoulder coverage in roughly 45 milliseconds when the integrated IMU sensors detect a crash event. The trigger algorithm has gone through several generations now — generation 3 in the Misano name — and false fires from a parking-lot tip-over or aggressive emergency braking are far rarer than they used to be.
The jacket itself is built around perforated cowhide on the impact zones with a stretchy bi-elastic insert across the back and sides for a real riding position. Comfort with the airbag deflated is roughly equivalent to a normal Dainese sport jacket — riders report not really noticing the system except at the slightly thicker collar area.
What it does well: this is one of the only airbag setups that doesn't ask you to wear two layers (vest + outer shell). The integration is cleaner than anything in the Alpinestars line that requires the Tech-Air 5 or 10 vest underneath a separate jacket. For sportbike riders who care how the gear actually looks off the bike — and most do — the Misano 3 reads as a jacket, not a piece of safety equipment with a jacket bolted on.
Where it gets complicated: the recharge process. After a deployment, the jacket goes back to Dainese for recertification at a cost (varies by region; budget a few hundred). The battery is rechargeable via USB-C and lasts roughly 26 hours of riding per charge. If you forget to charge it, the system doesn't deploy — riders should make charging part of their riding ritual the same way they check tire pressure.
Versus Alpinestars Tech-Air 5 + Missile v3 jacket: the Tech-Air system has more independent crash-data refinement and works under multiple jackets, but it's two pieces. The Dainese is one piece, looks cleaner, and matches if you're already in the D-Air ecosystem (helmet camera, suit, etc).