shivering and not sleeping the whole night, eventually, puking up my dinner and then wretching after that. (Probably a combination of altitude sickness, exhaustion and shivering.) Brent N
sounds like, in addition to the windchill factor, you were sick. Illness whether AMS, virus, fatigue, whatever, can make you feel bad and be cold intolerant, no matter what.
You could have felt just like that back home at 75 degrees and under three blankets. I have. So do the scientific experiment :-)
go back up in similar conditions and gear but good heath, see if you feel the same. That would prove that it was you, or it was the gear.
One of the gear-quizzes we have for young scouts is the wind-layer versus insulation-layer topic.