The Merino Blend Ski+ Medium OTC Mountain Contour Sock adds full cushioning built for cold, long days on the mountain, with more padding underfoot and around the ankle than a lighter sock offers. It shares the same anatomical left and right construction as the rest of icebreaker's Ski+ line, with zoned support at the toe box, instep, and Achilles to keep everything locked in place inside a boot. A seamless toe closure and reinforced heel and toe cut down on pressure points, while the merino wool blend regulates temperature through a full day outside. What Our Gearhead(R) Experts Are Saying:"I reach for these on the coldest days of the season, the kind where my toes usually go numb by the second run. The extra cushioning kept my feet warm through a full day at altitude without ever feeling bulky in my boots."