Smartwool Womens PhD Run Ultra Light Micro Socks

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Size Chart
Light Gray
Dark Blue Steel
White-Light Gray
Blue Steel
Purple Mist

We've put all of Smartwool's smarts into these new and improved Women's PhD Run Ultra Light Micro socks. You won't break Smartwool's stride, thanks to Smartwool's Indestructawool technology designed for added durability and an Achilles tab designed to help prevent sock slippage. And by adding Smartwool's brand-new Shred Shield technology to Smartwool's running socks, the wear and tear from toes is reduced, helping you push toward Smartwool's finish line and achieve higher mileage.


  • Women's
  • 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


48% Merino Wool 48% Nylon 4% Elastane

Sock Height

Micro Height Sock

Sock Cushion

No Cushion Sock