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Hi!

If you have proper undersuit (from Thinsulate) on
longer dive, where the most of body moisture is
concentrated? Is it usual to condensate in between
undersuit and internal side of the dry suit? On
technical way body put latent energy in
evaporation of the water and it is released on the
inside part of the dry suit to outside. So this
can be significant way of energy loss. It this
case thickness of insulation are not helping just
resistance of material against water vapor
pressure. The problem is the similar with the
insulation of the houses with mineral wool (which
is hygroscopic) in alp or northern part of the
Europe. In this case the steam block is used -
foil to prevent house moisture to get in
insulation (it is hygroscopic and Thinsulate is
not) and also to prevent to leave the house (of
course in winter time). Maybe astronauts have the
similar problems with body vapor. Some interested
information - suggestion?

B.r.

Viktor



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