Smartwool PhD Run Ultra Light Pattern Micro Socks

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Size Chart
Light Gray

When it comes to running socks, we pull out all the stops to keep making improvements on Smartwool's products. With brand-new Shred Shield technology to help improve wear in the toe box, Smartwool's PhD Run Ultra Light Pattern Micro socks feature the 4 Degree elite fit system and Smartwool's Indestructawool technology for a dialed-in fit and improved durability.


  • Adult Unisex
  • Ultra Light Cushion
  • Micro Height
  • Indestructawool technology for enhanced durability
  • 4 Degree elite fit system for a dialed, performance-oriented fit
  • Shred Shield technology reduces wear from toes
  • Body-mapped mesh zones for added breathability
  • Virtually Seamless toe for enhanced comfort
  • Achilles tab designed to prevent sock from slipping down into footwear


46% Merino Wool 50% Nylon 4% Elastane

Sock Height

Micro Height Sock

Sock Cushion

No Cushion Sock