PhD Outdoor Mountaineer


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The right gear can make or break any expedition. That's why we've created the new PhD® Outdoor Mountaineer socks, our most technical mountaineering socks ever. We put some serious sock science to work in these all-mountain socks, including revolutionary Indestructawool™ technology for ultimate durability and the 4 Degree® elite fit system for a dialed fit. We placed high-density cushioning where you need it most, in the heel and toe, while using a flat knit on the leg to accommodate low-volume mountaineering boots. Mesh zones offer breathability, flex zones offer added comfort, and Merino helps keep feet warm, dry and comfortable.



Built for Performance in the Highest Degree

4 Degree™ Elite Fit System
4 Degree™ Elite Fit System

Uses two elastics for greater stretch and recovery to keep the sock in place


Indestructawool™ technology features a patent-pending construction method for exceptional durability and comfort

Mesh Venting
Mesh Venting

Mesh ventilation zones provide optimum moisture management and maximum breathability


  • Flex zone at ankle offers maximum flexibility
  • High-density cushion in heel and toe provide protection and comfort in high impact areas, while flat knit leg accommodates fit of low-volume mountaineering boots
  • 20-30 mmHg graduated compression rating helps post-activity recovery
  • Virtually Seamless™ toe
  • 14" overall height
  • Sock Height: Over the Calf
  • Made in USA of Imported Yarn: 50% Merino Wool, 49% Nylon, 1% Elastane

Collections: Footwear, multivariant, multivariant_fb, Socks

Category: Socks

Type: Footwear

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