Whether you make long treks with a backpack or log shorter hikes more frequently, the unique blend of wool, nylon, and elastane in the lightweight SmartWool PhD Outdoor Light Crew Sock helps the sock dry quickly, breathe sufficiently, and stay in place.

  • 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 Crew Sock

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Here's what others have to say...

4 5

Great Socks

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

Thick solid socks, very comfortable and keep the shape. The quality is unmatched. Wicking is good, but after a mile walk, which I do every day I can feel the sweat under them.

5 5

Sock'Tastic

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

These are my go to sock for more than just hiking. I wear they around town and I've even taken them mountain biking a few times.

They keep my feet warm but not hot. Nice support keeps them from bunching up and creating blisters.

5 5

My favorite sock

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

I've used these socks on a month long backpacking trip in the snowy and wet Olympic National Park, over a month and a half long backpacking trip through Europe, hiking in southern Utah, trail running, and mountain biking. I even used these socks skiing once. They always keep my feet dry and they always stay in place. Nothing annoys me more than a sock that moves around and doesn't stay in place around the calves. The merino wool is super comfortable as well. For being a light weight sock, I found these super warm while backpacking through the snow during the summer . Obviously a medium to heavy weight version of this sock would be more suitable for winter pursuits.

5 5

The most perfect sock

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

I've used these socks on a month long backpacking trip in the snowy and wet Olympic National Park, over a month and a half long backpacking trip through Europe, hiking in southern Utah, trail running, and mountain biking. I even used these socks skiing once. They always keep my feet dry and they always stay in place. Nothing annoys me more than a sock that moves around and doesn't stay in place around the calves. The merino wool is super comfortable as well. For being a light weight sock, I found these super warm while backpacking through the snow during the summer . Obviously a medium to heavy weight version of this sock would be more suitable for winter pursuits.

5 5

Perfection in socks

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

Never a complaint or problem. Great fit and even better durability. SmartWool is my go to sock.

5 5

HEY! Got great results in the field!

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

Guys guest what? found another place where the awesome tech of these socks can provide great results, and that's is in the soccer field!, I used to end up with lots of blisters and since I started using these socks, that is all in the past.

5 5

Awesome sock

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

I am very pleased with the performance of these socks. I wore them all day for multiple days with great results. They kept my feet dry and fresh all day in boots. very comfortable. I would recommend to anyone that has to do a lot of moving in warmer weather.

5 5

Very comfortable!

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

I got these socks a couple weeks ago and I love them. They are super comfortable, warm, and snug - everything you want in a sock.

5 5

Add me to the satisfied customer list

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

After reading all the positive reviews I decided to go ahead and try these socks. I wore them on a 3 day backpacking trip and found them to have more than adequate cushioning. They were supremely comfortable and most important, kept my feet warm during a cold night. This was my first experience with Smartwool socks and I was VERY pleased.

4 5

really nice

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

like all smartwool socks, these fit snug like second skin. no seams felt. no sag. merino rocks for moisture management and anti-stink. only drag is that smartwool socks don't have the best wear characteristics, especially in the heels. however, their warranty dept is good for replacing them (as just happened w/ my PhD Ski Compressions).

5 5

Another great present for the sister!

  • Familiarity: I gave it as a gift
  • Fit: True to size

I bought these for my sister as a Christmas present and she has nothing but good things to say! She wears them for casual city-wear and they keep her feet nice and toasty in the DC winter! She is a size 8 and says the medium is perfect! Great present!

5 5

Amazing Socks

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

I wasn't sure what I thought about wool socks as I had a few pairs in the past and they always made my feet sweat like crazy. These Outdoor Light Crew's absolutely do not do that. I don't know what the difference is but they are by far one of the most comfortable socks I've ever owned. I will definitely be getting a couple more pairs.

5 5

Great all around outdoor sock

  • Familiarity: I've put it through the wringer

I wear these socks for mountain biking, road biking, hiking, trail running and even they are great for casual wear. I'm in Utah so they especially are great to keep your feet warm on the bike in cold weather rides. They also dry quickly and don't stink like many synthetic socks. If you want them to last, always let them air dry after washing them in cold water. After a few years of using these socks, they are pretty much all I use now. I consider these socks a key component of my outdoor gear collection.

5 5

Merino, sooo soft

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

These are a great everyday sock; I wear hiking boots to work often and these are my go to sock. My foot is comfy and stink kept to a minimum.

5 5

This sock is magical

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

Strong enough to handle 9 days in the backcountry, soft enough for everyday wear.
On a late october hike I took a step into what I thought was stable footing and ended up in frigid water up to my knees, my boots and socks were soaked, and the temp was in the 50's. Yet after 15 minutes of hiking, my feet were warm.

Bottom Line: Smartwool made magic happen in my boots.

4 5

Smartwool kills it,

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

I got these socks a while back and since have multiple pairs and love them, I prefer them over icebreaker socks, I have both. They are good quality and great fit! Good warmth too! Recommend them to anyone looking for a decent hiking sock!

5 5

Blisterless

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

Needed a new sock to replace my running socks while I go hiking. These socks seem to be the solution. Comfortable, not to warm, and keeps my heels blisterless.

5 5

Love love love this sock!

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

The perfect weight for a late summer/fall hike. Very supportive. Almost no stink after 5 days use.