Why We Like It

Overlook caring for your feet and your time on the trail could be shorter (or waaaaay less fun) than expected. Smartwool PhD® socks represent the highest degree of performance. Made of Merino wool, they are chock full of smart features, advanced technologies and dialed fit systems, including a virtually seamless toe, to keep you comfortable and light on your feet, no matter what the trail brings.


  • Women's design and fit: Catered to the unique shape of a woman's foot, with a slimmer heel pocket, overall narrower profile, and women's-specific mesh ventilation zones.
  • 4 Degree Elite Fit System: A bi-elastic fit system for socks designed to not slip, bunch or bind, delivering more comfort over the long haul.
  • Activity-specific mesh zones: Unique mesh zones on the top of the foot increase breathability
  • Virtually Seamless Toe: A smooth finish delivers ultimate in-shoe comfort
  • Indastructawool Technology: A new, patent=pending construction placed in high wear zones that provides ultimate durability without sacrificing comfort.