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About SmartWool PhD Ultralight Micro Running Socks (For Men and Women)

2nds. Utilizing an ultralight merino wool blend with ReliaWool Technology in high-density impact zones, SmartWool's PhD Running Ultralight Micro socks are designed for mild weather and shorter distances.

Specs about SmartWool PhD Ultralight Micro Running Socks (For Men and Women)

  • Lightweight
  • Height: Ankle
  • Fabric: 54% merino wool, 42% nylon, 4% elastic or, 55% merino wool, 41% nylon, 4% elastic
  • Care: Machine wash/dry
  • Made in United States of America (yarn imported)
  • Visit our Wool Guide
  • US shipments only

Do you own this product? Write a review and help others with their buying decisions!

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4.631067 5 Overall Rating: 4.6 Based on 103 reviews

Most Helpful 5-Star Review

Verified Buyer Reviewed by S from Virginia on Thursday, February 11, 2016
No sweat. No smell. And good price from STP. The only socks I wear. (Fact: You can wear them 3 or 4 times before washing and they STILL don't smell. Not that I tried or anything.)
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  • Verified Buyer Reviewed by Joyce from Colorado on Wednesday, July 13, 2016
    love them, especially for summer running
  • Verified Buyer Reviewed by ionblastoidsmom from New York on Wednesday, July 6, 2016
    Smartwool socks! Best socks in the land and well worth the price. I wear them year-round, lightweight in the summer, heavier weight in winter. I have to keep ordering them because my daughters have discovered they love them too! P.S. the "2nds" are just as good as the "1sts"
  • Verified Buyer Reviewed by Cindy from Arizona on Tuesday, June 28, 2016
    Have worn these soclasses for years. Won't even consider a cotton sock anymore.
  • Verified Buyer Reviewed by Melinda from Indiana on Monday, June 20, 2016
    I always buy SmartWool socks. They are light weight and last a long time. And I can find them in my size (small) which is great.
  • Verified Buyer Reviewed by suzicruzi from Washington on Friday, June 3, 2016
    Perfect socks for daily use. Probably my favorite of all my SW socks, because they are so versatile. I can wear them with my gym shoes, casual sneaks, or with my Keen Sandals. I always order up a size (just me) and they seem to take less of a beating by being pulled snuggly at the toes and heel all the time. It's not that they run small, don't misinterpret - I just like ordering up, and being able to wash and dry, and not worry about shrinkage. I can get several years use out of one pair, as I have many. Ha.

Questions about this product? Get answers from community and staff experts.

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  • Question “What reason are they seconds?”

    Asked on 8/25/2016 10:45:50 AM by Tami from Arizona
    • Answer I have bought several pairs and use daily
      But can't tell why they are seconds
      Smart wool is a great product and maybe their expectations are really high to the untrained eye
      I can't see it
      Maybe if I knew what to look for
      Answered on 8/25/2016 10:51:51 AM by Ak ok from Alaska
    • Answer We are not given exact reasons why products are being labeled as seconds. Generally it is due to minor cosmetic blemishes or irregularities which do not affect the fit, performance, or longevity of the item. Label is usually clipped by the manufacturer. A small flaw means big savings.
      Answered on 8/26/2016 8:34:49 AM by Product Specialist Greg from Sierra Trading Post
    • Answer I see they've removed the sizing chart tab from some products. You can usually see the shoe size (7-9 1/2, 10-12 1/2, etc) a size (S, M, L) is intended for when you select a size (S, M, L). For this sock, for women, the Small should be for women's 4-6 1/2 and the Medium for 7-9 1/2.
      Answered on 12/13/2013 3:14:05 PM by Mel from Central New Jersey