Smartwool PhD Run Ultra Light Print Crew Socks

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Size Chart
Bright Blue

Smartwool's PhD® Run Ultra Light Print Crew puts the fun in functional. With a unique design and all of Smartwool's latest tech—including Indestructawool™ technology, 4 Degree™ Fit System, Shred Shield™ technology, and a Virtually Seamless™ toe—these Merino wool socks just became your most uplifting running companion.


  • Indestructawool™ technology for enhanced durability
  • 4 Degree™ elite fit system for a dialed, performance-oriented fit
  • Shred Shield™ technology reduces wear from toes
  • Body-mapped mesh zones for added breathability
  • Virtually Seamless™ toe for enhanced comfort
  • 8.5" Overall Height
  • Made in the USA


46% Merino Wool, 49% Nylon, 4% Elastane, 1% Polyester

Sock Height

Crew Sock

Sock Cushion

Ultra Light Cushion Sock