How does a g-suit work?
A g-suit puts pressure on the abdomen and legs to return blood to the heart and brain. Pressure of 40-50 mm Hg can relieve symptoms of Orthostatic Intolerance (OI). Pressure of 250 mm Hg or more helps prevent blackouts for fighter pilots experiencing positive G’s. A g-suit can be inflated manually and the pressure is easily adjustable.