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W's PhD Ultra Light (UL) Zip T


Keep your workout moving all season long with smart pieces that work hard alone or layered up. Our PhD® Ultra Light fabric combines the temperature and moisture regulating properties of Merino with polyester for greater stretch and recovery and quicker dry time than Merino alone. Gender-specific mesh panels increase breathability.



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

UPF 20

Naturally protects against the sun's rays


  • Semi-Form Fit
  • Lightest weight Merino/polyester blend ensures fabric moves moisture, dries quickly, and maintains its shape in high-sweat activites
  • 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
  • 8" (20 cm) center front zipper with chin guard
  • Knit in Vietnam: Body: 56% Merino Wool, 44% Polyester; Mesh: 54% Merino Wool, 46% Polyester
  • Style: SW0SO166


  • Machine Wash Cold Gentle Cycle.
  • Do Not Bleach.
  • Tumble Dry Low.
  • Iron Low.
  • Dry Clean.