PhD Run UltraLight Micro

The PhD Run Ultra Light Micro sock from Smartwool features a unique fit system, designed to keep the sock in place and provide all-sport versatility.


  • Patent pending ReliaWool Technology in high impact areas provides the longer lasting protection to keep feet comfortable
  • 1.5″ overall height
  • >1×1 ribbed welt
  • Elastics offer greater stretch and recovery to keep the sock in place
  • 54% Merino Wool, 44% Nylon, 2% Elastane, washer and dryer friendly