Abstract: The safety device comprises an inflating product container which holds an inflating product and is operatively associated with an inflatable bladder to be worn by a user. The inflating product container is adapted to be placed in an open condition in which an inflating product is allowed to inflate the inflatable bladder. An adapter provides fluid communication between the inflating product container and the inflatable bladder and includes (i) a container coupling formation adapted to secure the adapter to the inflating product container and (ii) an actuator operatively adapted to place the inflating product container in the open condition. A controller includes a sensor assembly so that in use, the controller is adapted to generate an activation signal responsive to measurements taken by the sensor assembly. The actuator is operatively adapted to place the inflating product container in the open condition responsive to the controller generating the activation signal.