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PhD Cycle Ultra Light Pattern Crew Sock

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Sometimes you just want a tall bike sock. A sock that fits well in your shoe, doesn't rub, and helps keep your feet dry and comfortable on even the longest rides. The Smartwool PhD Cycle Ultra Light Crew checks all of those boxes, and features Indestructawool technology for ultimate durability. Smartwool's proven 4 Degree Elite Fit System uses two elastics for superior stretch and recovery, designed to ensure the socks stay in place even during intense use.


  • 200 needle construction provides highest knit density while maintaining ultra light weight.
  • Indestructawool technology provides exceptional durability and comfort.
  • 4 Degree Elite Fit System uses two elastics for superior stretch, recovery, and fit.
  • Mesh ventilation zones provide additional breathability and moisture control.
  • Non-cushioned for maximum performance in close-fitting cycling shoes.
  • Virtually seamless toe.
  • 8.5" overall height.
  • Made in the USA.
  • 48% Merino Wool, 47% Nylon, 5% Elastene.

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Shoe Size(US Men)03-5.56-8.59-11.512-14.50
Shoe Size(US Wom)04.5-6.57-9.510-12.500
Shoe Size(Eur)034-3738-4142-4546-490