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The SmartWool PhD Outdoor Light Micro Sock satisfies your desire to have a sock at equal height to your shoe cuff, and it utilizes a little more wool than its ultralight counterparts to add a bit of extra warmth and cushion.

  • Blended composition maximizes the benefits of each separate material while minimizing fabric drawbacks
  • Soft merino wool breathes well, helps regulate body temperature, and is naturally odor resistant
  • Nylon components dry quickly, breathe well, and add extra durability
  • 4Degree Elite Fit system employs ankle, instep, and arch elastic bands for a snug fit, support, and circulation
  • ReliaWool tech on the bottom of the sock combines high-density impact zones along the ball and heel for long-lasting protection
  • Mesh zones allow heat and moisture to escape quickly to promote faster drying to reduce swamp foot
  • Virtually seamless toe construction limits irritation and chafing

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SmartWool PhD Outdoor Light Micro Sock

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Here's what others have to say...

5 5

Love these socks!

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

These socks feel great! Perfect for running, hiking, or everyday use. I never thought socks could offer "support" but the compression design really helps. These offer much more support than the old cotton socks I have been wearing for years. I would definitely purchase these again.

5 5

Can't Stop Won't Stop

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

By the beard of Zeus, these socks rock. I am obsessed. They are probably the most comfortable thing I have worn on my feet...ever. They off awesome support and help keep your feet dry when you are running around and playing in the snow.

I have about 9 or 10 pairs and they are my go to socks.

5 5

Always get a pair

  • Fit: True to size

These socks are awesome, comfortable, and pretty good at keeping my feet dry. I usually try to just snag a pair any time I make an order, I want to only have a sock drawer with these, and not those dumb wal mart cotton socks that come in packs of 20. Quality over quantity of course.

5 5

You can't go wrong with this sock.

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

I wear it day in and day out. The "Light" has the right amount of cushion for me. I found that with anything less than that, "Ultra Light", I wore out the front of the sock before I could really put them to use. Nothing sucks more than your toes poking through the front of your sock. Maybe sand in your underwear.

4 5

Awesome with one issue

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

These socks are awesome. they stay up above your heel- when socks fall down is a huge peeve of mine.. they're super comfy, and wick sweat super well. Only beef is they sit a bit low on the heel and some shoes go over and rub my heel above them... I just make sure i know what shoes i'm wearing when i have these on..

5 5

Best sock I've tried

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

A lot of people seem to have an issue with wearing wool in the summer, but these things to a fantastic job for me in any temperature. They are super comfortable, retain their shape and wick better than anything else I have tried. I don't ever wear any sort of waterproof running shoe, and with these on my feet dry extremely quickly.

5 5

Sock it to me

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

Just a very nice wool sock. I have many smart wool socks they are always comfortabe an nice to run in. I wear a size 12.5 sneak I got the xl

3 5

Well made, but not for summer use.

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

I'll start out by saying that I really wanted to like these socks. I wear SmartWool and Icebreaker socks all winter and love how toasty they keep my feet. I was attracted to the fact that these have extra padding for increased comfort. I figured that since these socks were "light" that I would be ok using these with temps in the low 70s. Wrong. I've used these for trail running and hiking with meshy trail running shoes and my feet still roast. Maybe I need to give the "ultra light" variety a try and understand what temps these socks are designed to be used in. A high quality product, just not for summer use.

Well made, but not for summer use.
5 5

Hands down my Go-To sock

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

I probably own 12-13 pairs of these socks. So comfortable, wick moisture very well and stay in great shape as far as durability. I actually wear these socks snowboarding and my feet are super comfy, dry and warm all day long. Love em!

5 5

Wonderful purchase.

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

These socks are lighweight and comfortable. They kept my boyfriends feet cool on our hikes and kept the moisture out after crossing rivers. The extra padding on the balls and heels of the foot are extra comfortable.

2 5

Good Sock but holes

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

I wore these a bunch, but not any more than a cotton crew sock and I have created a hole in one of the socks. Other than that they are pretty good but I am thinking cotton crew socks from the dollar store from now on.

5 5

Favorite Socks

  • Familiarity: I've put it through the wringer

Everything about these socks is great. They fit well and stay in place and they breathe and wick well, even after multiple days. Also, they cushion well and don't get packed down after years of use. I would say get some ultra light weight as well for hot summer days. Otherwise, these socks fit the bill for just about everything.

5 5

Love em

This might be my new favorite sock! Super comfy and very high quality. They are low profile, but stay tightly around your ankle, as they don't slip down. Looking for a low cut sock? Get these.

5 5

Use them all the time! Good quality

Its hard to go back to "regular" socks after wearing these or any of smartwool's socks. Just so nice!

5 5

Great socks for all uses!

These socks are awesome. I own over 10 pairs in different colors. They are thin and breathable, but have extra wool cushion on the heel and balls of the feet, as well as around the top of the sock at the ankle. I bought them to wear hiking & backpacking, but now I wear them pretty much every day. I run marathons and wear them on my long runs, as well as to work every day. I walk around a lot at my job and need good shoes and socks. These do the trick!

5 5

Bought for hiking trip

  • Gender: Male
  • Familiarity: I've used it once or twice and have initial impressions

I hiked 18 miles (in Chicago) as a trial for a planned hiking trip in New Zealand (Milford Trek) which spans 33 miles over 5 days. I felt very comfortable with these socks; you will want a sock liner to use with these type of wool socks, planning to use these with Salomon XA Pro 3D Ultra GTX shoes and the longer cousins of these type of smartwool socks with a pair of North Face Dhaulagiri II GTX boots which I simply love and wish they were still on the market!