Found this BTS image On set in the Yuma desert ( Barge scene ) RoTJ whilst doing another search, i haven't seen it before. what caught my eye is it gives to some degree dimensions of the kit in a more static posture.
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Too bad it's so dark. Would have been nice if they took pics from the other side lol. Yeah these are cool, there's a whole set of them where they're dressing the Elvis looking guy, and also a few of him in the air. Good stuff!
To me it looks like this is getting ready for the jet pack flight, he probably has on the full harness system under the armor. At least that is my guess just looking at the appearance......