I used to be a devotee of SmartWool....but I like Darn Tough better, w/ their Unconditional Guarantee for Life, made right here in Northfield, Vermont.
https://darntough.com/pages/darn-tough-vermont-community
I have a too large selection of socks including some Darn Tough, they and many other brands have yet to wear out?
I have different smartwool and they are also doing well.
For some reason, the over-the-calf smart wool is not very good.
Mostly I wear wool socks year-round of differing weights.
Including some Throlo running socks (not wool) that I completed a few marathons in, back in the 1970-80s, still wear them!
The heels must be made from kryptonite?
Cotton can be comfortable but I sweat and it turns to mush in the shoe.
'Gold Toe' is my everyday sock of choice, but I will check out 'Darn Tough.' :)
If you want to confuse a youngster, ask them what THIS is used for.
Thanks for new source, I love trying out USA businesses.