I received two pairs of Darn Tough socks for my birthday. Finally, I have moved away from Smartwools socks and tried something else.
Darn Tough makes some high claims. They are, as the name suggests, tough. Ryan Jordan was tempted to take a single pair on the Arctic 1000, but took two full-cushion models (the spare was for mittens) instead.
My primary socks (five pairs) are Smartwool Adrenaline microcrews. The cushioning is still there, but the Achilles' area has been rubbed down to the lycra. That said, they are still excellent socks and have not died yet.
But when they do die, maybe I'll go to Darn Tough for good.