i'm a bit of a spacesuit purist. i can totally appreciate the slim fit but i like the bulk of a proper suit.
keeping yourself cool is the first thing you gotta do in space; keeping yourself warm is second to that, and the typical response is to just make sure there's a lot of cooling going on via a fluid circulation layer in the suit itself. that shit is bulky.
reason why they have those big packs full of life support tech; good part's batteries, good part's pumps
i say this knowing full well that the gemini spacesuits existed