the patent describes an aircraft ejection seat position and restraint system for protecting an aircrewman against back injuries during emergency escape. the ejection sequence is initiated by the aircrewman pulling a lower ejection handle or a face curtain handle with both hands to release or shatter the cockpit canopy. a torso harness suit is con-committantly tightened with inflation of a vest worm between the aircrewman and the suit, and catapult rockets are fired to propel the seat out of the cockpit. the harness suit draws the aircrewman's upper torso against the back of the seat while the inflated vest pushes his hips back and down into the set pan for optimally positioning his spine before ejection thereby negating the effects of an aircrewman purposely or inadvertently flying with a loose harness. after ejection, the seat is separated from the aircrewman but the vest remains inflated inside the harness providing cushioning against the opening shock force of the parachute which is attached to the harness suit. the inflatable vest is formed as a separate, one-piece garment which may be removed between flights (author)