SmartWool PhD Run Ultra Light Micro Sock - Women's

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
  • Reviews
  • Q & A

Does the Job

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

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

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.

Super soft!

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

Bought these for my girlfriend, she loved them. She said they're super soft and comfortable.

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

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

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)

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

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

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!

Super socks

  • Fit: True to size

I'm very happy with these! They're thin but not wimpy. Slide easily into my shoes. High quality socks and excellent fit! I want 5 more pairs.

Great!

  • Fit: True to size

Excellent fit and high quality. My feet feel great.

Cool Socks!

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

These socks are wonderful! Lightweight and breathable, even in hot and humid North Carolina summers!

Brilliant long lasting sock

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

I have purchased these in the past and had to get some more. They are great for using in your tenny's. My feet swell at any hint of heat and especially if I'm moving so these socks are great as they are thin enough to allow for swelling and they wick and keep my feet dry! I love the tab on the back - which helps prevent possible blister prone people/or the shoe that might give a blister because of where it sits on your heel. My last pair I had for about 3 years, and even then they were still functioning. I didn't have holes, and maybe by the end of my exchanging out the heel was a tiny tiny tiny bit thinned, but not really. They were still usable. I highly recommend these and think these are worth the investment. Well made and this season has great colors which I as a color lover really really like.

The wife loves them!

  • Familiarity: I gave it as a gift but have feedback to share
  • Fit: True to size

My wife loves these socks. Comfort based socks with the ability to go out and crush a hard workout!

good for sweaty feet!

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

I have really sweaty feet. it sucks. these keep my feet feeling fairly dry, even on long hikes! they dry fast too, good for backpacking.

BEST SOCKS AROUND!

  • Fit: True to size

These are my all time favorite socks! I have about 6 pairs in all different colors. I use these all year round and love them! they are soft, supportive and breathable! I use them for running, hiking, biking, and around town. If you don't already have these you need to get them!