> Can you name a manufacturer and a designation  for the polypropylene socks?

I'm afraid not. I looked for it this morning. I'll  keep an eye open 
next time I go to "Club Price". They look and feel exactly like wool 
socks except that on the label it said "100% polypropylene".
Any serious montain climbing/camping store should have them and 
the polypropylene underwear. 

Since a few years now, "Thinsulate wool" is on the market. I suspect that
socks made of that stuff would be even warmer than the polypropylene ones. 
The reason thinsulate is so good is that the fibers are extremely small 
in diameter. Insulation does not come from the material but rather from 
the traped layer of air that you are able to keep around your body.
The same volume of thinsulate (as comapred to any other  insulation 
material) will therefore trap more air. Up to 30% if I remember right. 
Since this stuff is also synthetic it also does not trap moisture.
I have yet to find/try a pair of "thinsulate wool" socks but I'd sure 
give them a try.

BTW: I don't know about the situation down in the States but up here 
everything that has the "Patagonia" label is way over priced. The stuff 
is well built but you can find equivalents for 60 to 50% of the price.
 
In Montreal it is a suny and windy -20C and, yes, my feet are toasty since 
I'm wearing one of those pairs of polypropylene socks of mine ;-)

                                                                    [\]
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 Foster Radiation Laboratory,   It's in the eyes of my wife and kids."
 McGill University,                 Office: (514) 398-7025
 3559 University street,               Fax: (514) 398-7022
 Montreal, Qc, Canada.              e-mail: roger@ph*.mc*.ca*
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