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      For the brave and the bold, the Mountaineering Extra Heavy Crew is made help you reach both the mountain's peak and your own. Smartwool's thickest and heaviest sock uses a Smartwool® 2 Degree fit system with elasticized arch and ankle support that's designed to keep the sock in place as you make progress, as well as a flat knit toe seam for consistent comfort.

      Hike Liner Crew Socks - Unisex
      PhD Outdoor Heavy Crew Socks - Unisex
      Mountaineer Mid Calf Socks - Expedition Cushion - Mens
      PhD Outdoor Medium Crew Socks - Unisex

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