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You spent an obscene amount of money on those fancy running shoes, so why would you run in  a pair of cheapo socks that eliminate any good that the shoes are doing for your feet. The Smartwool PhD Running Ultra Light 3/4 Crew Sock has an advanced degree in comfort and support to work with your high-dollar running shoes and provide increased performance with reduced fatigue.

  • Elasticized arch brace for added support
  • Flat knit toe seam eliminates chafing and irritation caused by toe seam
  • Wool-on-wool system adds an extra layer of wool to the heel and toe areas for shock-absorption and durability
  • Made with odor-reducing New Zealand Zque Merino wool

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SmartWool PhD Running Ultra Light 3/4 Crew Sock

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Here's what others have to say...

4 5

Techy Socks!

I wore these in the Utah desert last week and they kept my feet cool in hot temps! They also didn't smell after two days and no washing!

5 5


Just like any smartwool sock. Its going to be a great sock. Odor preventing, comfortable,and well made