SmartWool PhD Ultralight Run Socks - Merino Wool, Quarter Crew (For Women)

Item #6544V
$6.99 Save 56% Compare at $15.95

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About SmartWool PhD Ultralight Run Socks - Merino Wool, Quarter Crew (For Women)

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


Specs about SmartWool PhD Ultralight Run Socks - Merino Wool, Quarter Crew (For Women)

  • Lightweight
  • Height: Quarter crew
  • Fabric: 54% merino wool, 42% nylon, 4% elastic or, 52% merino wool, 44% nylon, 4% elastic or, 59% merino wool, 37% nylon, 4% elastic
  • Care: Machine wash/dry
  • Made in United States of America (yarn imported), Korea, Republic of (yarn imported
  • Visit our Wool Guide
  • US shipments only


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

4.734177 5 Overall Rating: 4.7 Based on 79 reviews

Most Helpful 5-Star Review

Verified Buyer Reviewed by Ritzy's mom from Minneapolis on Thursday, April 21, 2016
Love these socks for running. They tend to shrink up even with machine wash cool and line dry, so I sized up this time. I wear size 8/12-9 women's street shoe (9 wide or 9.5 Medium running shoes).
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  • Verified Buyer Reviewed by JJPN from Grand Junction, CO on Monday, May 8, 2017
    Love these socks, especially for the price. Nice color. Great fit. Will order more.
  • Verified Buyer Reviewed by Divemasterkathy from California on Wednesday, March 15, 2017
    These wear well and stay on your feet without moving into your shoes.
  • Verified Buyer Reviewed by Zen from NY on Thursday, February 2, 2017
    Soft and very pretty!
  • Verified Buyer Reviewed by Carrie from Colorado on Thursday, February 2, 2017
    I have these in purple and they are very cute (if you care about that!). They are comfortable and do a great job of not sliding down. I have blister issues when running longer distances and usually wear double layered socks. I thought I would give these a try as I have friends who love them. On shorter runs they are great. On they longer (5+ miles) runs, I still got blisters. I do not think the socks caused the blisters, they just failed to prevent them. I will continue to wear them on shorter runs and casually.
  • Verified Buyer Reviewed by Jess the Skiier from California on Tuesday, January 24, 2017
    I like the aesthetic design as well as the fit. These socks are warm but not as warm as thicker wool socks I have. Which is okay since my other socks can get too hot depending on the weather. That said, these are my go to socks right now. I plan to use it as an under layer to my other thicker socks for an upcoming ski trip because it is perfect for that. I do wish it was sold in packs of 3 or something.

Question & Answer

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

  • “What shoe size is a medium sock?”
    Asked by pbnana from Oregon on 8/6/2014 10:23:27 PM
    • I wear an 8.5 to a 9.5 running shoe and the medium fits me perfectly.
      Answered on 8/6/2014 11:26:58 PM by Venice runner from CA
    • Generally, a medium runs from a size 6 to size 8. This is a wonderful sock - comfortable, warm but not too hot.
      Answered on 8/7/2014 5:29:24 AM by Betty from Denver
    • Per the package medium fits US Women Size 7-9.5 (US Men 6-8.5, Euro 38-41).
      Answered on 8/7/2014 7:13:22 PM by Icebox Runner from Minnesota
    • 7 to 9-1/2 according to the sizing provided by STP. Simply put the cursor over the "S" "M" or "L" and the size will pop up.
      Answered on 8/7/2014 7:57:04 PM by Sanpan from Palm Harbor FL
    • This style and brand MEDIUM is for womens shoe size 7-9.5. If you click on the s/m/l.....the shoe size pops up right about it. That is the case for most items on this website - especially all socks.
      By the way - these socks are awesome!!!!
      Answered on 8/9/2014 9:39:43 AM by Quality bargain shopper from spring lake, MI

About SmartWool

Born in the Rocky Mountains of Colorado, the SmartWool clothing brand launched in 1994 as a small company with roots in the snowsport industry. Quickly becoming world-famous for SmartWool socks crafted of super-soft, breathable and odor-resistant merino wool, SmartWool has continued to evolve, now offering a wide range of fantastic apparel for active lifestyles, including SmartWool ski socks, base layers, underwear, sweaters and even jackets. Thanks to a commitment to using only the highest quality fibers and sporty, modern designs, SmartWool socks and clothing continue to exceed the demands of outdoor lovers everywhere.