How a Riding Airbag Works: Trigger, Cartridge, Fit
Three parts, three decisions.
An airbag vest is something that notices you have left the horse, something that fills the bladder, and something that has to fit. Each part has a decision attached to it.
Mechanical or electronic release, a cartridge that is a running cost, and a close fit: get those three right and the vest works as designed.
The trigger
Most systems are mechanical. A lanyard clips to the saddle, usually to the girth or a dedicated strap, and the other end sits in a housing on the vest. When the distance between rider and saddle passes the release force, a ball key or pin is pulled out and the cartridge opens. It needs no power and has one failure mode everyone knows: dismounting while still clipped in.
The alternative is electronic. USG’s digital Aixplorer replaces the lanyard with a control unit that decides when to inflate, and the front buckle has to be properly closed for the system to arm. That removes the dismount problem and adds a device to charge. Neither approach is universally better; they trade one habit for another. The lanyard, or the arming buckle, is part of the safety system and not an accessory.
The cartridge
A CO₂ cartridge is what actually inflates the vest, and it is a consumable. A replacement is roughly 22 to 25 euro, which is why several vests are sold as bundles – the USG Aixplorer Softshell comes with three.
After a deployment the vest is a jacket until it is re-armed, so if you ride again the same day you need a spare in the car. Cartridges are pressurised gas, and airlines and some couriers restrict them: check before travelling to a show abroad. Manufacturers also specify service intervals for the cartridge and the firing mechanism, and they are in the manual because the mechanism has to work once, years after purchase.
The fit
An airbag has to sit close to the body. Equitheme states it plainly for the Airsafe: worn tight, or the protection around neck, back, lumbar spine, sacrum, pelvis and chest does not happen where it should. A vest bought a size up to fit over a jacket is a vest that inflates around you rather than against you.
That is where airbag-compatible outerwear comes in. Equiline’s Entrec and Exot jackets have a sleeve opening for the lanyard – a small detail that decides whether the vest still gets worn in January, when the alternative is choosing between a warm jacket and a working airbag.
Over a protector, or instead of one?
Both exist. The Covalliero Manege is built light enough to go over a body protector, so an airbag can be added to protection you already own. The hybrids – Veredus VITA Vest, Freejump X Air SAFE – build the airbag around a foam or certified protector layer instead, so something is always working.
Which route is right depends on what you already have. If there is a well-fitting Level 3 protector in the tack room, an over-vest is the cheaper upgrade. If you are starting from nothing, a hybrid is one garment to fit and one thing to remember.
Children and maintenance
Child versions exist, and the same rules apply more strictly: growth, a system a child can arm and disarm without help, and honesty about what actually gets worn. A correctly fitted Level 3 protector that a child puts on every time beats an airbag that stays in the tack room.
Whatever you buy, put the service interval in the calendar, check the lanyard attachment point on the saddle every few weeks, and keep one spare cartridge where you will find it.
A fired vest without a spare cartridge is a jacket. Budget the cartridges, not just the vest.
- Mechanical triggers need the habit of unclipping; electronic ones need charging and a closed buckle.
- A replacement CO₂ cartridge costs roughly 22 to 25 euro and is a running cost.
- An airbag only works worn close to the body – never buy a size up to fit over a jacket.
- Airbag-compatible jackets with a lanyard opening are what keep the vest in use in winter.
- An over-vest adds an airbag to a protector you own; a hybrid combines both in one garment.
Technical description from manufacturer documentation and published standards. Service intervals, fit and competition eligibility follow the maker’s manual and the rule book of your discipline.
