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The SmartWool PhD Women's Outdoor Ultra Light Crew Socks are sewn with a blend of ultra-breathable, non-itchy merino wool and durable nylon. Dive your toes straight in for a minimalist feel and maximum performance.

  • Blended composition maximizes the benefits of each separate material while minimizing fabric drawbacks
  • Non-itchy 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 better stretch, fit, support, and circulation
  • ReliaWool tech on the bottom of the sock combines high-density impact zones along the ball and heel provides long-lasting protection
  • Strategically placed mesh vents zones help regulate temperature and manage moisture
  • Seamless toe construction limits irritation and chaffing

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Here's what others have to say...



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

I've worn these in the desert and icy hikes in the backcountry. And no matter where I go, these socks wick away my sweat in the heat and keep my feet warm when it's cold. Even when I trekked through water-soaked slot canyons, these socks dried quickly and didn't give me any blisters.

I normally wear a size 7 in street shoes and the size Small fits perfectly. They don't slip or bunch, and they still offer room to move freely.

Since they're so lightweight, it makes hiking feel extremely comfortable so I never have to focus on my feet.


Breathable and comfy

  • Familiarity:I've used it several times
  • Fit:True to size
  • Height: 5'2"
    Size Purchased: small

I haven't done any extensive hiking in these socks yet, but for the few times I've used them they've been great! Very breathable, keeps your feet dry and are super comfortable! I wear a size 6 in street shoes and the small was perfect


Great socks

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

These are ultra-light hiking socks, perfect for light boots or hiking shoes. Being SmartWool, your feet stay dry and comfy regardless of the conditions.


So Comfortable

  • Gender:Female
  • Familiarity:I've used it several times

Love the colors and how comfortable these socks are.