An inflatable restraint device for a vehicle seat having a lower seat cushion includes a central portion and at least one side portion. The central portion extends in a lateral direction substantially across a central seat cushion portion of the lower seat cushion and has a first width perpendicular to the lateral direction. The at least one side portion laterally protects an occupant of the vehicle seat and has a second width perpendicular to the lateral direction. The second width is greater than the first width. The at least one side portion is in fluid communication with the central portion.