Smartwool PhD Outdoor Heavy Crew Socks


A new and improved classic. The new PhD Outdoor Outdoor Heavy Crew features Reliawool Technology for improved durability in the high wear areas and the 4-Degree Elite Fit System, to keep the sock in place and giving you all-sport versatility. This is the perfect heavy sock for mountaineering adventures.

Specs Sizing Reviews
  • Knit in USA of 86% Merino Wool, 12% Nylon, 2% Elastane
  • New 4 Degree Elite Fit System uses two elastics for greater stretch and recovery to keep the sock in place
  • Patent pending ReliaWool Technology in high impact areas provides the longer lasting protection to keep feet comfortable
  • Strategically placed mesh ventilation zones provide ventilation for temperature and moisture management
  • Flat knit durable toe seam for high burst strength
  • 1x1 ribbed welt
  • 1x1 ribbed leg
  • 8.5" overall height
Size US Men US Women
Small n/a 4-6.5
Medium 6-8.5 7-9.5
Large 9-11.5 10-12.5
XL 12-14.5 n/a


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  • PhD Outdoor Heavy Crew Socks


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