Offical website said: "Darth Vader's grim black attire was a life-support system, his labored mechanical breathing the sound of a walking iron lung. Critically injured in a lightsaber battle with Obi-Wan Kenobi years ago, Vader became "more machine than man," kept alive only by the devices built into his suit. The fearsome visage of his breath mask reflects the dark identity that he assumed after his fall from the light side of the force."
It doesn