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Smartwool Women's PhD Run Ultra Light Cushion Micro Socks

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We put all of our smarts into these new and improved run socks that feature our 4 Degree™ elite fit system, ReliaWool™ technology for superior durability and a virtually seamless toe. Women's-specific mesh ventilation zones provide ultimate temperature and moisture regulation where female runners need it most.


  • 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
  • Mesh Venting: Women’s-specific mesh ventilation zones provide additional breathability and moisture management
  • Ultra Light Cushion: Minimal cushioning for maximum next-to-foot performance without added bulk


  •     Virtually seamless toe
  •     Achilles tab
  •     200 needle construction provides highest knit density while maintaining ultra light weight
  •     1.5" overall height
  •     Sock Height: Micro
  •     Knit in USA of Imported Yarn: 53% Merino Wool, 43% Nylon, 4% Elastane
  •     Style: SW0SW188


    Machine Wash Warm Gentle Cycle. Do Not Bleach. Tumble Dry Low. Do Not Iron. Do Not Dry Clean.

Small = Womens 4 - 6.5

Medium = Women's 7 - 9.5 / Men's 6 - 8.5

Large = Women's 10-12.5 / Men's 9 - 11.5

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