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  • Smartwool - PhD Outdoor Light Micro Sock - Ash
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Smartwool PhD Outdoor Light Micro Sock

30% Off
sale from $13.27 $18.95

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    • Ash, L
      sale $15.16
    • Black, M
      sale $15.16
    • Black, L
      sale $15.16
    • Black, XL
      sale $15.16
    • Everglade, L
      sale $14.99
    • Everglade, XL
      sale $14.99
    • Taupe, L
      sale $13.27
    • Taupe, XL
      sale $13.27


    68 Reviews


    PhD Outdoor Light Micro Sock

    Capable of handling arduous uphill treks and rambling trail runs with equal aplomb, the Smartwool PhD Outdoor Light Micro Sock combines a performance blend fabric with unwavering fit for supreme comfort in demanding terrain. Merino wool regulates temperature to keep you comfy through the ups and downs of your journeys, nylon enhances durability, and a touch of spandex adds movement-conforming stretch. Smartwool's 4 Degree Elite Fit System ensures your socks won't slip or bunch halfway through your hike, and light cushioning relieves impacts when you're making your way across rugged terrain.

    • Lightweight performance with all-sport versatility
    • Soft merino wool regulates temperature
    • Blended with synthetics for stretch and durability
    • Flat knit toe seam relieves pressure points
    • 4 Degree Elite Fit System won't slip
    • Light cushion is ideal for variable terrain
    • Item #SWL00MU

    Tech Specs

    60% merino wool, 38% nylon, 2% elastane
    1.5 in
    Recommended Use
    hiking & camping
    Manufacturer Warranty
    2 years

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    Really Love.

    • Familiarity: I've put it through the wringer

    I need more of these because I only have two pair but will run 6 days a week with them. They are so soft and thick, they'll add a half size to your foot though. But super comfy, I'll always take these for the long run.

    Running Sock

      Nice Thick sock! I throw these on with My salomon speedcross pro 2 and i can run for miles. They fill up any extra space in the shoe and they dont smell after runs. I am honestly going to buy a few more pairs of these to have on hand.

      Comfy & Cushy

        These socks are a great addition for anyone- my husband uses them for a variety of activities, including casual wear, going to the gym, and hiking. For being a lightweight sock, they certainly do have a lot of cushion to them- but he doesn't seem to care, as they are definitely comfortable. Just something to keep in mind- if you're looking for a very thin sock to fit in a tight shoe, I would go for something with a little less cushion.


        • Familiarity: I've used it several times

        These socks are light but they are incredibly cushioned. With the elastic band around my arch, I feel extra support. The added lip makes it so they don’t fall down in my shoes, which is typically a big pet peeve for me.

        Very freaking comfy!

        • Familiarity: I've put it through the wringer

        I've been doing my laundry more often, just so I can experience the fantastic wonder that cradles my feet in merino wool. If you're giving these as a present, be prepared to accept the responsibilities of being the favorite.

        Rockin' Socks

        • Familiarity: I've used it several times

        Sweet light weight socks feels like nothing is there except all the comfort. Wicks away sweat like a breeze and there isn't unnecessary bulk from a seams that would get in the way. Love to wear things because I can throw any activity at them and they'll perform well!

        Best socks

        • Familiarity: I've put it through the wringer

        I love everything smartwool makes and these socks are no exception. They are really comfortable and durable. I wear them casually and while hiking. The heel support is aweoome aswell!

        it's like a blanket for my feet!

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

        Feels good, right size, and helped wick away sweat from my feet.
        Just jumped back online to grab a few more pair (for family and friends)

        Great fit and feel

        • Familiarity: I've put it through the wringer

        Perfect for everyday wear, running, or hiking. No seems in the toe area makes them super comfortable no matter what shoes you're wearing. These also have some cushioning along the bottom for added comfort when running, hiking or just lounging. Merino wool keeps them from getting too smelly. They hug your feet and stay in place preventing slippage along the heel and bunching underfoot.

        Great wool socks!

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

        I bought these for my wife and she was very skeptical at first. But after wearing them on a backpacking trip through Escalante she changed her mind completely! She loves these socks! They're warm and comfortable and for her... the best thing is they retain their shape whether wet or dry.


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

        I purchased these for my husband and he loves them. They are comfortable and time will tell if they are durable. Good quality socks.

        My go to backpacking socks

        • Familiarity: I've put it through the wringer

        I wear these things everywhere but where they really shine is out on a backpacking trip. I'll bring two pairs for a week long backpacking trip and they never get disgusting enough to where I don't want to put them on my feet.