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Smartwool Men's PhD Light 1/4 Zip Shirt


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When your calendar says it's time for an 8-mile run, throw on our PhD Light 1/4 Zip and run 10. With this warmer Merino-polyester blend, moisture moves away from your skin quickly and efficiently. Designed specifically for men, it integrates ultra-breathable mesh panels mapped to male sweat patterns. Merrow seam construction is soft against your skin. Thumbholes in the cuffs help keep cold out and hands warm. When you're done, this piece dries fast and maintains its shape mile after mile, month after month.


  • PhD®: Built for Performance in the Highest Degree
  • Light: Lightweight Merino blend provides stretch and recovery, breathability and quick drying
  • Body Mapped Mesh Venting For Men: Body-mapped mesh panels for additional breathability and moisture management
  • 360° Reflectivity: Adds visibility in low light conditions

Technical Details

  • Regular Fit
  • Minimal Merrow seam construction provides superior durability and is soft against skin
  • Integrated thumbhole openings for additional coverage
  • 9" (22 cm) center front zipper with chin guard
  • 56% Merino Wool, 44% Polyester; Mesh: 54% Merino