$9.95 Save 41% Compare at $16.95
We apologize for the inconvenience! This product is currently sold out!
This feature is only available for colors and sizes not currently in-stock


About SmartWool DO NOT USE/USE 8457V

2nds. SmartWool wrote the book on performance socks, and SmartWool's PhD Light Micro running socks are definitive proof. These slip-resistant merino wool socks keep your feet dry, well ventilated and properly cushioned.


Specs about SmartWool DO NOT USE/USE 8457V

  • Lightweight
  • Height: Below the ankle
  • Fabric: 69% merino wool, 29% nylon, 2% elastic
  • Care: Machine wash, tumble 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!

4.740000 5 Overall Rating: 4.7 Based on 50 reviews

Most Helpful 5-Star Review

Reviewed by MTcanyncrittr from West Glacier, MT on Thursday, March 6, 2014
Not too bulky, not too thin. Fabric conforms to foot nicely without slouch. Someone who puts a lot of miles on with feet issues, these socks save the day!
Your search for "" returned reviews for SmartWool-DO-NOT-USEandUSE-8457V Remove reviews search
  • Verified Buyer Reviewed by Cactusgirl from Wild and Woolly West Texas on Monday, February 2, 2015
    They do their job. This is the thin version of their running sock. They are stamped with "irregular" however I haven't found any difference between them and my regular pairs of this same sock. So, if it is raining, grab a pair of these and be happy.
  • Verified Buyer Reviewed by NC mom from NC on Wednesday, January 28, 2015
    These are great like all SmartWool socks. The socks are cushioned in the heel and forefoot (not thin all over like some of their running socks). I was recently converted to a wool sock runner (even in the summer) and I don't think I'll ever go back.
  • Reviewed by FrugalNHMom from NH on Tuesday, January 13, 2015
    My family loves Smartwool PhD ski socks, so I was looking for a nicely cushioned wool sock to wear for our upcoming trip to Disney World. I've read that good quality wool socks will reduce blisters and will keep our feet dry, so I ordered a pair of these on spec. I've already gone back to order more! These are very nicely cushioned in the heel and ball of the foot (just where I need it) and the little extra cushion on the back of the heel at the top helps these stay in place so they never slide down into my shoe. If there is anything negative to note, the "white" has a definite grey undertone in person, but it's not enough of a deal-breaker for me to rate these down. Keepers!
  • Reviewed by Dr. Bison from Georgia on Thursday, January 1, 2015
    These, however, are still excellent socks. I'm a converted cotton and polyester sock girl. Not sure what took me so long but so glad I now see the light! These socks are light weight but durable. They feel much thicker than they are (that's a good thing). Basically, they are thicker than your average sock, offering more support, but you shouldn't have a problem squeezing into your favorite athletic shoe with them on.
  • Verified Buyer Reviewed by RetiredNga from Georgia on Monday, December 8, 2014
    I wanted socks that would be comfortable to wear to my cardio class at the gym, but would keep my feet warm when I returned home and walked the dogs in cold weather. These socks were great for both activities. My only regret, I didn't order more as they are now sold out in my size and color preference.

Question & Answer

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

    • I got the M, the same size I always get. I believe if it says men and women, the sizing is accurate when you hover over the size. These are great sockks!
      Answered on 5/30/2014 10:43:02 PM by Anonymous from seattle
    • I purchased the Large socks for women, I believe they were listed as fitting 10-11 which I wear an 11 women's shoe. They definitely would not fit a men's size 10-11.
      Answered on 5/31/2014 6:43:20 AM by Brookegirl from TEXAS
    • They are sized differently for men and women. If you hover your cursor over the size (S,M,L etc.) the appropriate men's and women's size will pop up!
      Answered on 5/31/2014 8:31:33 AM by Cardiff mom from Cardiff-by-the-Sea, CA
    • I have several pair and I wash them in warm water and dry low temp. I have not noticed any shrinkage.
      Answered on 7/30/2013 11:38:30 AM by Kathryn from Northern Idaho
    • they are very durable. Im too lazy so i throw mine in the dryer but they still last at least 2 years of abuse. if you air dry em they'll last even longer.
      Answered on 11/25/2014 9:19:53 PM by W1llth3thr1ll from Maryland

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.