We call ours poopie suits, and I have no idea why, I think we were told once, but oh well LOL. I've got survival training annual next week and I'll ask the "experts". THe best part of Poopie Suit training, "burping" them as you don them over your neck.
We call our chem suit plastic fullbody hoods "body condoms".
Ciao, and Hook 'em Horns,
Capt-AWACS, Veni, Vidi, Bibi