Smartwool PhD Run Ultra Light Micro Socks at Road Runner Sports
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Smartwool PhD Run Ultra Light Micro Socks

Smartwool PhD Run Ultra Light Micro

Item #SMT119

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Reviews (9)
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Product Description:

SMARTWOOL® PHD RUNNING ULTRA LIGHT MICRO :: Get the comfort and wicking benefits of Merino Wool without extra bulk. The light and thin SmartWool® PhD Running Ultra Light Micro sock is designed to keep your feet comfortable without over heating in any weather. Enjoy extra protection in high impact areas. And don't fuss with stretched out socks, resilient wool springs back into shape wash after wash!

Features & Benefits:

  • New 4 degree Elite Fit System uses two elastics for greater stretch and recovery to keep the sock in place
  • Patent pending ReliaWool Technology in the high impact areas provides the longer lasting protection to keep feet comfortable
  • Low profile and durable virtually seamless toe
  • Alternating 1x1 welt
  • 1.5" overall height
  • 54% Merino Wool/44% nylon/2% Elastane
Product SMT119 Review

Go-to sock for everything


I have tons of socks in the drawer, all in an attempt to avoid blister issues that have been a persistent problem for me. These socks are the best I've found for blisters, and they're thin and light enough to feel fast for racing or any kind of run. Another bonus is the thin wool that keeps things warm in the winter, but isn't hot in the summer. Just great.


Washington, DC


Gotta love Smartwool


I really like Smartwool products. These socks are very comfortable, they're a little thin for my taste but they are ultra lights so that's to be expected. Not sure about durability yet but other Smartwool products I have bought have lasted for a long time and I'm happy with the purchase.

Big Wally

Seattle, WA


Thins and light, kept my feet pretty cool!


I love the snowboarding socks (not for snowboarding but for keeping my feet warm). I tried these and am now a complete convert. They kept my feet relatively cool and the socks didn't irritate a blister from a pair of high heels. Definitely impressed and will be buying more!


Phoenix, AZ


Good Ultra-Thins


Ok guys if you're like me, a little "Smart Wool" on your feet is Heaven! For me, Wool ensures no blisters and a comfortable work-out. These are perfect as a "base-layer" sock. Add a mid-weight or heavy-weight cushion sock over these, and you're good to go!




Comfortable but.......


Comfortable socks but they keep slipping down into my shoe which then leaves my ankle bones and heel exposed to rubbing and blisters. Have many smart wool socks but this is the only style I've got that I have this issue with.


Chicago IL


Love these socks


I wear these all the time for running. I like thin socks, these are very comfortable and durable, no wear-through on the heels or shrinking after multiple washings.


St Louis, MO


Hot runs and gym


A little too thin for daily use or cold runs, but I like them for hot days and they work fine for gym use when my feet get sweaty.




Love all the smartwool socks!


Great for all kind of running on the road or trail. No blisters in this socks!


St. Augustine, FL


New favorites!!


Great for a wool running sock! Extra support were needed, and love to fun colors!!


Rockville, MD


Smartwool PhD Run Ultra Light Micro Socks

4.4 9


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