 In the 1940s and after undergoing numerous modifications, the suit was refined for use as an anti-gravity suit (G-suit).Further modification led to its use in the Vietnam War for resuscitating and stabilizing soldiers with traumatic injuries before and during transportation.In the 1970s the G-suit was modified into a half-suit which became known as MAST (Military anti-shock trousers) or PASG (Pneumatic Anti-Shock Garment).