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PhD Running Ultra Light Micro

SKU #: pg37009


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PhD Running Ultra Light Micro
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Product Information


Smartwool's ultra light cushioned PhD Running Ultra Light Micro is the perfect running sock for mild weather and shorter distances. Thanks to WOW technology in high density impact zones, shock and abrasion are reduced. The 4-Degree Fit System also keeps the sock in place. Made in the USA of New Zealand Zque™ Merino wool.


  • 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 Low profile and durable virtually seamless toe
  • Alternating 1x1 welt
  • Single layer 1x1 ribbed top
  • Cushion: Ultra Light
  • Knit in the USA


Fabric52% Merino Wool, 44% Nylon, 4% Elastane

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