What Our Gearhead® Experts Are Saying:“These are the warmest crew socks I own. I grab them anytime I know I’ll be outside in serious cold, and the max cushion feels like walking on thick wool clouds. Bonus points for the recycled Second Cut™ yarn!”We trust the Smartwool Mountaineer Classic Edition Max Cushion Second Cut Crew Socks when the mercury drops and the days demand uncompromised warmth. Engineered for the coldest conditions, this is the warmest Classic Edition crew sock Smartwool makes, and it's built with purpose from the yarn up. Blending soft Merino wool with unknown reclaimed fibers in Second Cut™ yarn, this sock keeps performance high while extending the life of old materials. Max cushioning underfoot adds plush impact absorption on long winter treks or mountain lodge strolls. With all the benefits of Merino—temperature regulation, moisture control, and natural odor resistance—this sock is our staple for staying warm and treading lightly.