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As far as i remember, people wearing clothes with this type of insualtion had problems with overheating.

However things may have changed since then

https://www.outsideonline.com/1919251/forget-down—aerogel-in...

Interesting. I was wondering since I've felt cold in almost every Gore-tex jacket I have worn. Also it would seem to me that using a really thin layer of the aerogel stuff could prevent overheating, keep warm while being stupidly thin and impressive.

Gore-Tex is not meant to insulate unless you're talking about just the bare skin feel against the inside of the jacket. Some Gore-Tex jackets had a mesh liner which helps alleviate that cold surface feeling (and protect the teflon layer).

If you're interested in insulation for high-exertion activities, Polartec Alpha is now the bee's knees.

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