IF you like a thick sock that will act like a compression sock, this is for you.  IN my case, my ski boots already are pretty tight, so the added bulkiness didn't help the fit.  Didn't hurt too much in the shoe area though because doubling up on thinner socks would have produced the same effect, and also they do keep the toes warm.  However, when I removed the sock, my calves right above the sock were about 3/4 of an inch or so wider than the area right next to it that had been compressed by the sock.  My leggings -- to be worn with ankle boots -- looked really weird with this natural ridge in my calf that I could not get rid of for several hours.