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  • Smartwool - PhD Run Ultra Light Micro Sock - Women's - Medium Gray
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  • Smartwool - PhD Run Ultra Light Micro Sock - Women's - Dark Blue
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  • Smartwool - PhD Run Ultra Light Micro Sock - Women's - Capri
  • Smartwool - PhD Run Ultra Light Micro Sock - Women's - Black
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Current Color

  • Smartwool - PhD Run Ultra Light Micro Sock - Women's - Medium Gray
  • Smartwool - PhD Run Ultra Light Micro Sock - Women's - Berry
  • Smartwool - PhD Run Ultra Light Micro Sock - Women's - Dark Blue
  • Smartwool - PhD Run Ultra Light Micro Sock - Women's - White/Smartwool Green
  • Smartwool - PhD Run Ultra Light Micro Sock - Women's - White/Light Gray
  • Smartwool - PhD Run Ultra Light Micro Sock - Women's - Light Gray
  • Smartwool - PhD Run Ultra Light Micro Sock - Women's - Capri
  • Smartwool - PhD Run Ultra Light Micro Sock - Women's - Black

Smartwool PhD Run Ultra Light Micro Sock - Women's

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    • Medium Gray
    • Berry
    • Dark Blue
    • White/Smartwool GreenPast season color
    • White/Light Gray
    • Light Gray
    • Capri
    • Black
    5534

    34 Reviews

    Details

    Run smarter not harder.

    The Smartwool Women's PhD Run Ultra Light Micro Sock has just enough sock at the ankle to shield you from cuff on ankle rub but is still lightweight enough to keep you light on your feet. In addition to the the natural breathability of merino wool, mesh ventilation zones promote further ventilation, so you never feel the sweats in your feets. 

    • Merino wool, nylon, elastane blend
    • Reliawool technology
    • Mesh ventilation zones
    • Ultralight weight
    • Item #SWL00AS

    Tech Specs

    Material
    54% merino wool, 42% nylon, 4% elastane
    Height
    1.5 in
    Weight
    ultralight
    Cushion
    none
    Recommended Use
    running
    Manufacturer Warranty
    2 years

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    Best socks

    • Familiarity: I've put it through the wringer

    I love these socks! I stock up on them whenever possible. They are perfect for running. Thin, don't fall down and great sweat wicking.

    This is my 3rd Pair!

    • Familiarity: I've put it through the wringer
    • Fit: True to size

    I love these socks. They are the perfect socks for hiking and running! They are very lightweight, breathable, and moisture-wicking. The toes have worn out a bit on my older pairs, but I would expect it with how much use I get out of them.

    Does the Job

    • Familiarity: I've used it once or twice and have initial impressions
    • Fit: True to size
    • Height: 5'6"
    • Weight: 125lbs

    This sock is breathable and lightweight. The back lip helps the sock stay in place so don't have to mess with the sock bunching down in the shoe.

    Favorite Sock

    • Familiarity: I've put it through the wringer
    • Fit: True to size
    • Size Bought: medium
    • Height: 5'5"
    • Weight: 118lbs

    This is one of my mom's favorite socks for hiking and biking. She also wears them for work (she's a nurse). They are soft, comfortable, stay put and wick moisture throughout the day.
    Worth every penny.

    Great sock

    • Familiarity: I've used it once or twice and have initial impressions
    • Fit: True to size
    • Size Bought: Medium

    I'm a size 7.5 and have a wide foot, and ordered Medium. Love them. Exactly what I wanted - a good wool ankle sock.

    6/5

    • Familiarity: I've put it through the wringer
    • Fit: True to size
    • Size Bought: M

    Before you continue to read, you should probably just throw these in your cart. These socks have been my GO TO since putting on the first pair I ever ordered! They are awesome for my narrow feet, and I dont think I have ever work a softer sock. They're amazing! They definitely breath when I use them to run/hike/casually walk around and they are still kicking it after about 6 months of pretty heavy usage. I highly highly highly recommend you snag a pair of these!

    I wear a size 8.5-9 and a medium is perfect.

    Great for small feet

    • Familiarity: I've put it through the wringer
    • Fit: True to size
    • Size Bought: Small
    • Height: 5'2"
    • Weight: 125lbs

    Stays on your heal when running! I love these ankle socks because they don't slip. I bought them in every color.

    Bonus for me, I have small feet (size 6) and I usually find that 'small' socks are too big. The smartwool range for smalls is size 4-6.5. Yay!!

    Soft as a Bunny!

    • Familiarity: I've used it several times
    • Fit: True to size
    • Size Bought: Small
    • Height: 5'1"

    Love these socks! They are SO comfortable, and wick away sweat like they were made to...oh wait, they were made to ;) Eventually, all my socks will become a Smartwool collection. They will never be worth a lot of money years from now, since they will forever be made due to their awesomeness and quality! Smartwool folks be smart with their products. I wear a size small in this sock, and in shoes I'm a 6 or 6.5, and they're perfect!

    Can't Go Wrong

    • Familiarity: I've put it through the wringer
    • Fit: True to size
    • Size Bought: Small

    You really can't go wrong getting a pair of smart wool socks. I normally wear a 5 or a 6 in women's shoes, when i first got these socks i thought they were going to be too small but as soon as i put them on I knew I was wrong. It was a great fit. I wear them all the time. I even came back and bought 6 more pairs of different smart wool socks after I used these a couple times. Definitely a great buy!

    LOVE THESE SOCKS

    • Familiarity: I've put it through the wringer
    • Fit: True to size
    • Size Bought: Medium (shoe size 7)
    • Height: 5'5"
    • Weight: 135lbs

    This is probably my fifth pair of these socks. I love them for working out - but also for travel. For a 2-week trip, I'll bring 3 of these pairs of socks because I know that I can wash them out at night and they'll be dry for me the next morning. Love them!

    Great socks!

    • Familiarity: I've used it several times
    • Fit: True to size

    I love these socks with my Keen Whisper Sandals. They are thin enough that they fit great with the Keens, but also keep my feet warm and dry. My feet don't sweat in them, and when I walked in water they didn't get soggy on my feet. I also wear them with my sneakers when I go to the gym. I ended up buying 3 pairs of these because I like them so much. I machine wash them in cold and hang dry them. I wear a size 6 shoe and the Small size fits really well. I ended up buying a pair of the men's for my husband and he loves them too!

    Great socks for multiple activities

    • Familiarity: I've used it once or twice and have initial impressions
    • Fit: True to size
    • Size Bought: Small
    • Height: 5'5"

    I bought these socks for a long distance bike trip I'll be going on this winter in New Zealand (so it will be summer there). They have great arch support with slight compression across the top of the foot to the arch. The heel also has some extra material to add some protection against rubbing against your sneaker. They are lightweight however and do not protect against biking in the high desert on a 40 degree day. They should be absolutely perfect for a 70 degree in New Zealand where rain is always a factor. SmartWool is always a great go-to product for warmth when wet and lack of smell. One tough training ride down and I'll won't have to wash them before the next one.

    Surprisingly Warm Socks

    • Familiarity: I've used it several times
    • Fit: True to size
    • Size Bought: Medium
    • Height: 5'6"
    • Weight: 140lbs

    I actually ordered these because I needed to spend a little more to qualify for free shipping on something else I bought. I regularly wear the Smart Wool cabled crew length socks which I love, so I didn't hesitate ordering these.
    These footies/socks are quite thin so I was initially concerned that they might not keep my feet warm. In fact they do just as good a job as keeping my feet warm AND dry as my thicker SmartWool socks.

    They run true to size and they're nice in that they're almost invisible with sporty shoes on.

    the best ankle socks

    • Familiarity: I've used it several times
    • Fit: True to size
    • Size Bought: small

    I wanted a warmer pair of ankle socks to wear with my tennis shoes on those colder days and these were the perfect choice. I've used them for both hiking and casual walks. I wear a size 8 shoe and bought a small. The fit was great!