A vehicle seat includes a cushion and a seatback coupled with the cushion and rotatable between collapsed and open positions. The seatback includes a first inflatable bladder within an interior of the seatback, a pneumatic actuator fluidically coupled with the bladder and configurable between a compressed condition and a withdrawn condition, and a control cable coupled between the actuator and the cushion for linking the configuration of the actuator with the position of the seatback.