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Product details
- PhD: Built for Performance in the Highest Degree
- 4 Degree Elite Fit System: Uses two elastics for greater stretch and recovery to keep the sock in place
- ReliaWool: Patented ReliaWool technology in high impact areas provides superior durability
- Heavy Cushion: Heavy cushioning offering significant impact absorption for extended backcountry excursions
- Strategically placed mesh ventilation zones provide ventilation for temperature and moisture management
- Flat knit durable toe seam
- 8.5" overall height
- Sock Height: Crew
- Knit in USA of Imported Yarn: 71% Merino Wool, 27% Nylon, 2% Elastane
Product information
The Men’s PHD Outdoor Heavy Crew Sock by SmartWool is a new and improved classic. The socks feature ReliaWool technology for improved durability in the high wear areas and the 4 Degree elite fit system, to keep the sock in place and give you all-sport versatility.
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Smartwool’s values:
- Openness: Smartwool builds and maintains trust through transparency about the company, its vision, and its direction.
- Advocacy & Action: Smartwool believes in doing everything we can to preserve our one-of-a-kind environment, so everyone can experience the joy of the outdoors.
- Inclusivity & Fun: Smartwool believes in being compassionate, actively kind, generous, and accountable to all people.

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