Smartwool PhD Mountaineer Socks


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Designed for the best comfort and protection inside low volume mountaineering boots, the Smartwool PhD Mountaineer Socks have heavy cushioning in the heel and toe with flat knit foot and leg areas, a flat knit toe seam and mesh areas for ventilation. Merino wool will help regulate moisture and temperature from a sweaty ascent to a frigid descent while the 4 Degree Elite Fit System keeps the sock from bunching or slipping in your boot.


  • Fabric: 81% merino wool, 18% nylon, 1% elastane
  • 4 Degree Elite Fit System uses two elastics for greater stretch and recovery to keep the sock in place; ankle band, upper instep band, lower instep band, arch band
  • ReliaWool Technology in high impact areas provides longer lasting protection; more durable than normal wool
  • Strategic mesh zones for maximum ventilation
  • Flat knit foot and leg with heavy duty yarns for maximum comfort and protection in low volume mountaineering boots
  • Heavy cushion heel and toe
  • Flat knit durable toe seam
  • 1x1 ribbed welt, 1x1 ribbed leg
  • 14-inches overall height
  • Height: Over-the-calf
  • Cushioning: Non Cushion leg and Heavy Cushion heel and toe

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Available sizes, while supplies last, include size small, size medium, size large and size extra large: s, m, l, xl.

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