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Ultralight comfort.

SmartWool's PhD Run Ultra Light Mini Sock is prime on tracks, treadmills, and streets. Super Soft ReliaWool mixes naturally odor-resistant merino wool with highly durable nylon and stretchy elastane. Designed with SmartWool's 4 Degree elite fit, this sock uses elastics for a secure fit, greater recovery, and long-lasting stretch. Mesh zones give your foot plenty of ventilation for a cool run in warm temperatures.

  • ReliaWool merino blend
  • Naturally antimicrobial
  • 4 Degree elite fit
  • Mesh ventilation zones
  • Seamless toe

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Men's PhD Run Socks

Professional Ultra Runner & Fan Field Tester Timothy Olsen shares how the PhD Run socks help him go far, and feel good.