An airbag module for protecting an occupant of a vehicle seat. The module includes an inflatable cushion and an inflator. The cushion is configured to inflate into a position inboard of the vehicle seat and includes a first inflatable chamber fluidly connected to a second inflatable chamber. The cushion is configured to inflate into a position in which the first inflatable chamber is in a position to absorb energy resulting from relative movement of the torso of the occupant in a direction lateral to the longitudinal axis of the vehicle. The second inflatable chamber is configured to inflate into a position to absorb energy resulting from relative movement of the head of the occupant.