A seat assembly includes a seat back operatively coupled to a seat cushion for pivotal movement between seating and folded positions. The seat assembly includes an air bladder. An air control system is operatively coupled to the air bladder for automatically inflating and deflating the air bladder in response to pivoting the seat back between the seating and folded positions. The air control system includes a pressure vessel for storing a predetermined volume of air, a fill valve for controlling air flow from the pressure vessel to the air bladder, a first pressure sensor for monitoring air pressure in the air bladder, a pump for filling the pressure vessel with air, a second pressure sensor for monitoring air pressure in the pressure vessel, a control valve for controlling air flow from the pump to the pressure vessel, and a vent valve for venting air from the or bladder.