- a bag mounted in the interior of a motor vehicle, cushioning the seat occupant by inflating automatically in the event of collision.
- a very large inflatable safety or cushioning device, as to protect a spacecraft during a landing.
- a safety device in a car, consisting of a bag that inflates automatically in an accident and prevents the passengers from being thrown forwards
- one of a number of large inflatable bags comprising part of a spacecraft's landing system, enabling the craft to come to rest through a series of bounces
