There are different kinds of saunas. Nobody gets into a 90c humid sauna, that would just kill you.

Oh I can assure you, millions people in the northern europe do exactly this ;)

EDIT: I guess it depends on your definition of "humid". But 90C and regular water infusions are pretty common sauna conditions.

I mean yes it depends on your definition of humid but if your definition of humid is under 20% RH then that's not in agreement with any other humans on the planet and if it's over 50% RH then no, millions of people are not doing this because they would die. Our bedroom is at 50% RH because under that our baby's skin dries out. There's no way anyone is sitting in a 90 C 50% RH sauna for any appreciable amount of time. They would die.

I guess I am a revenant - I get into one regularly in my basement.

Haha no, I been in 90c saunas many times. Can I stay there for a long time? Heck no. But some people can and it doesn’t kill you (maybe if you have some preexisting condition)

the point is the humidity. hot saunas need to be relatively dry otherwise your sweat won't evaporate.

[deleted]