These are the Dale of Norway Lillehammer socks knit in Nature Spun sport weight. I am still kicking myself for not knitting the cool Norwegian deities on the feet. I've worn them exactly once - for cross-country skiing back when we lived in Colorado.
These asymmetrical knee socks were knit with some naturally colored wool handspun yarn I bought on Ebay. I had just heard Elizabeth Zimmermann had died so I used charts I found in one of her books.
DH has worn these for cross-country skiing although I'm not sure they are the right size. I guess I have to make some more!