fourth generation like a F-15 F-16 is a fourth generation fighter we wore gits on the abdomen and down on the legs and basically what that does as you pull G's you're going against gravity and Blood starts to drain from your brain down into your lower extremities so the git is just a tightening restriction of your muscles starting with your calves hamstrings buttocks all the way up and we do the yeah the the hook you hook and that's really to hold the oxygen in and what that does is lock everything down to hopefully hold the blood up in your brain as long as possible