As to liners, consider bamboo. Lots of bamboo based rayon socks available right now. I have crew socks from Gold Toe that are fantastic everyday socks...as good as wool (and I was wearing wool socks year round before the bamboo came around). I did find some lightweight bamboo socks at Target, so you might want to give them a try.

Why, though, are you insisting on 100% wool? Just from a maintenance standpoint a basically wool sock with a small amount of synthetic to help it keep it's shape and give it enough of an elastic quality to keep it from sagging while worn seems to be much more practical.

Mind ye...whatever floats yer boat...but I'm curious as to why you're so into 100% wool.

Best

AA