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Smartwool Men's PhD® Ultra Light Long Sleeve


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When your workout needs a little more coverage, this long sleeve is at the ready. Featuring our quick-drying Ultra Light fabric, this top is primed for sweaty workouts. The temperature and moisture regulating properties of Merino team up with polyester for greater stretch and recovery and quicker dry time than Merino alone. Men's-specific mesh panels increase breathability.


  • PhD®: Built for Performance in the Highest Degree
  • Ultra Light: Ultra light Merino blend provides stretch and recovery, breathability and quick drying
  • 360° Reflectivity: Adds visibility in low light conditions
  • Semi-Form Fit
  • Thoughtfully designed raglan sleeves remove underarm and shoulder seams
  • Flatlock seam construction designed to eliminate chafing
  • Gender-specific body-mapped mesh panels for additional breathability and moisture management

Technical Details

  • Knit in Vietnam: Body: 56% Merino Wool, 44% Polyester; Mesh 54% Merino Wool, 46% Polyester