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I've used a few, Woolpower 800, Smartwool Mountaineering, Darn Tough, and the norwegian raggsokk, and honestly I've prefered the raggsokk. Just keeps me warm and has good cushion, which is weird because the other socks mentioned definitely seem more high tech. I was thinking about trying some alpaca socks in the future, but ill have to do some more research as I see many different companies with different wool content/blend.
I don't double sock tho, I think a single wool socks + altberg boots (+ pullover boots) is a good all year combo that follows the layering system well