What Our Gearhead(R) Experts Are Saying:"These are my go-to socks for mountaineering boots and long winter approaches. The cushioning zones are dialed-especially around the Achilles-and the merino keeps my feet dry and warm even in single-digit temps. The added height is perfect for higher-cut boots."Big alpine days call for gear that works as hard as we do, and The North Face's Alpine High Sock delivers warmth, support, and breathability where it matters most. Built to handle cold, high-altitude environments, this sock features a merino-rich blend for natural thermoregulation, plus a technical knit design for zoned performance in mountaineering boots. Strategically placed cushioning at the Achilles, ankle, toe, and forefoot absorbs impact on steep descents and long approaches, while extra padding in the front helps shield against lace pressure and cold. A ribbed cuff and extended heel lock the sock in place, and the top-belt midfoot support ensures a secure, structured fit. Knit ventilation zones on the top and sole regulate temperature, making this sock ideal for sustained movement in harsh conditions.