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Specifically designed to perform in the sub-zero temperatures that alpine climbers regularly endure, the Thorlos Thick Cushion Wool/Thor Lon Mountaineering Sock provides big warmth without losing the ability to wick away moisture. The 100% worsted wool toe keeps frostbite away, and thick cushioning underfoot helps to absorb the shock of rough terrain. It's no surprise that this sock is the go-to choice of guides at the American Alpine Institute. 

  • Blend of worsted wool and Thor Lon is specifically designed to provide warmth, moisture management, and blister protection in sub-zero temperatures
  • 100% wool toe area increases warmth where it's most needed
  • Thick cushioning in the ball and heel helps to absorb impacts
  • Medium cushion in the ankle, shin, and arch increases comfort in tight-fitting boots
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