These are ski socks that are pushed by some of the best boot fitters in the north Tahoe area. I was told at the time I bought boots that my socks were too thick and that I needed these Euro Socks. They are very thin, almost like womens hosery. I wore them on two occasions when it was snowing and in the mid twenties. My feet were cold both times.After that I switched back to my Wigwam thin wool ski socks and my feet were fine in similiar conditions. The Wigwam socks are only slightly thicker and I really didn't notice any difference in the fit of my ski boots. I'm not sure what the make up of the Euro Socks is (I threw away the packaging or never got it out of the store) but it feels like wool. I have owned other Euro Socks and I must say they were some of the worst socks I have owned in terms of quality. I had them in rotation with other running socks and they wore out really fast. Seems strange as they are made in Italy I believe.
Interestingly, my neighbor and ski bud had a similiar experience with these socks. He bought ski boots at Sugarbowl, was told he had to be in these Euro socks, skiied in them several times and had cold feet. I told him it was the socks, he switched back to his standard thin wool ski socks and his feet were warm again.
So, I'd be interested as to what other peoples experience is with these socks.Needless to say, I don't recomend these socks.