An airbag system for a vehicle includes an inflator and an airbag defining an inflation chamber in communication with the inflator. The airbag includes a first extension and a second extension spaced from each other and each in communication with the inflation chamber. The first extension and the second extension are each selectively inflatable from an undeployed position to a deployed position. A controller is programmed to provide instructions to release one or both of the first and second extensions to the deployed position in response at least to a detected direction of an impact of the vehicle.
