Our take On the coldest days, this sock can be the difference between turning around and enjoying a winter adventure. Our tester gave it the seal of approval after a 10-mile, sub-zero snowshoe near Colorado's Hoosier Pass. "I was able to feel my toes for the entire day, a rarity for me," he says. "Plus, I was breaking in a new pair of boots and fighting through a foot of fresh powder, but I didn't get any hot spots, let alone a blister." The Denali is made of 91 percent merino wool, which traps heat and moves moisture, while 8 percent nylon lends durability (the other 1 percent is elastane). After a full winter of use, our tester didn't see any signs of pilling.
Trail cred "It's not very stretchy, but this sock is so thick that it holds its shape well and doesn't bag out over long days," our Colorado tester reports.
$30; S-XL; Buy the Farm to Feet Denali sock now