Survival vest or shirt, US Aviation in Vietnam

During my searches in web I came across such photo it cames from the www.casperplatoon.com site. My question is, what model of vest they are wearing?Anyone seen one live?
Thanks for any infos


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This looks like a very early pattern Aircrew uniform, patterned similar to 1st Model Jungle. The Aircrew uniforms usually have some similarity to the current ground soldier uniform. But personally I've never seen this particular uniform so my guess is only a guess

Steve

i think he is referring to the fact it looks like the pockets and name tapes are on some kind of vest because you can also see that there's 2 collars of sorts...as in theyre wearing 2 items over a t shirt..the normal jacket, or uniform, then the vest of some sort? I do not know what type of vest, for a moment thought you were referring to the harness attached to the pilot, but i noticed extra material over the shoulder of the underlying jacket...and the fact there seems to be a ring or some sort above the cap(something) tape...