SmartWool PhD Outdoor Light Socks

Priced: $12.57 - $20.95 Rated:   - 5 stars out of 5 by 19 reviews.
SmartWool PhD Outdoor Light Socks
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Color: Mineral
Available Colors: $12.57 - $20.95
40% off
Regularly: $20.97
REI $13.93 - $20.95
33% off
Regularly: $20.97
Sierra Trading Post $14.95
28% off
Regularly: $20.97
Al's Sports $15.74
24% off
Regularly: $20.99
Campmor $15.98
23% off
Regularly: $20.95
Massey's Outfitters $20.95 $16.72
20% off
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20% off
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Ramsey Outdoor $17.99
14% off
Regularly: $20.97 $18.99
9% off
Regularly: $20.97
Appalachain Outdoors $20.95
Christy Sports $20.95
Denali $20.95
Eastern Mountain Sports (EMS) $20.95 $20.95
Half-Moon Outfitters $20.95
Moosejaw $20.95
Mountain Gear $20.95
Rock/Creek Outfitters $20.95 $20.95 $20.95
The House $20.95 $20.95
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SmartWool PhD Outdoor Light Socks -
SmartWool PhD Outdoor Light Crew Socks are the highest performer in the SmartWool ladies socks line, great for trail running, hiking, mountain biking and more.
Crew sock height is the second highest in the SmartWool line, coming up to traditional crew height below the calf, keeping dust and dirt off your skin.
Made of the all-natural, odor free, moisture-controlling Merino wool fibers for which SmartWool socks are famous.
Wool-on-Wool (WOW) technology puts more SmartWool in high-impact and high-wear areas to help reduce shock and abrasion, making these performance socks a lasting pair.
SmartWool's 4-Degree Fit System means special attention to ankle, arch and insteps to keep sock in place - no bunching or slipping with this pair!
Strategically placed mesh zones provide maximum foot ventilation.
100% SmartWool fibers against your skin absorb sweat in its vapor state, which means sweat never condenses and makes your feet wet and clammy, and odor-causing bacteria won't build up.
SmartWool and its New Zealand Merino wool partners have developed Zque, the world's first traceable Merino fiber value chain to ensure environmental, social and economic sustainability, so you can buy SmartWools with a good conscience.
Our favorite SmartWool socks for women, these SmartWool Womens PhD Light Crew Socks are guaranteed to make your feet happy.


  • New 4 Degree Elite Fit System uses two elastics for greater stretch and recovery to keep the sock in place
  • Ankle bands, upper instep bands, lower instep bands and arch bands connect to the feet for a great fit and feel
  • Crew height coverage to fit with a variety of boots


  • WOOL on WOOL technology
  • Nylon components dry quickly, breathe well, and add extra durability
  • Virtually seamless toe construction limits irritation and chafing
  • Knit in USA of Imported Yarn: : Pattern - 68% Merino Wool, 30% Nylon, 2% Elastane; Non pattern - 69% Merino Wool, 29% Nylon, 2% Elastane
  • Blended composition maximizes the benefits of each separate material while minimizing fabric drawbacks
  • ReliaWool is a patent-pending reinforcement construction that puts more wool in high wear/high impact areas to increase durability and comfort
  • Soft merino wool regulates temperature to keep feet warm when it’s cold and cool when it’s warm, manages moisture for breathability, naturally resists odor, and does not shrink or itch
  • Merino wool keeps your body dry and inhospitable to bacteria that can cause odor

Support and Cushioning:

  • Light half cushion for light impact absorption

Wash and Care:

  • SmartWool socks are guaranteed not to itch and can be repeatedly machine washed and dried without shrinking
  • Turn inside out to avoid pilling. Machine wash on the gentle cycle with cool or lukewarm water using mild, non-bleach detergent. If you prefer powdered detergent, make sure to dissolve it completely before adding. Machine dry on low or medium heat.


  • Mesh ventilation offers increased breathability
  • Strategically placed mesh zones provide ventilation for temperature and moisture management
  • Mesh Vent Zones use open mesh knitting patterns for maximum ventilation

Weather and Wind:

  • Flat-knit durable toe seam for high burst strength


  • Patent pending ReliaWool Technology in high impact areas provides the longer lasting protection to keep feet comfortable


  • Made in United States of America (yarn imported)


  • 100% SmartWool against your skin
  • Mesh zones allow heat and moisture to escape quickly to promote faster drying to reduce swamp foot
  • PhD Outdoor Light Crew socks have a 8.5 in. height
  • 7.5” overall height
  • Discount will be applied when you check out. Offer not valid for sale-price items ending in $._3 or $._9
  • US shipments only
  • Smartwool Inside For Moisture
  • 1x1 ribbed leg
  • ReliaWool tech on the bottom of the sock combines high-density impact zones along the ball and heel for long-lasting protection
  • Wow Technology In High Density Impact Zones To Reduce Shock & Abrasion
The SmartWool PhD Outdoor Light Crew women's sock used SmartWool's proprietary 4 Degree Fit sport support system and a women’s specific design to give you the ultimate in support and a secure, comfortable fit around your foot's heel, arch and instep. The PhD Outdoor Light Crew sock uses ReliaWool Technology in high impact areas, providing longer lasting protection and a more comfortable feel. Mesh ventilation zones allow your feet to breath. The SmartWool sock has a flat knit, durable toe seam for extra strength.

FEATURES of the Smartwool Women's PhD Outdoor Light Crew.
SPECIFICATIONS of the Smartwool Women's PhD Outdoor Light Crew.

Smartwool's light half-cushioned Women's PhD Outdoor Light Crew is their most versatile outdoor sock. Specifically designed for a woman's foot. Thanks to WOW Technology in high density impact zones, shock and abrasion are reduced. The 4-Degree Fit System keeps the sock in place.
You don't need a PhD to figure out what a class act these women's hiking socks from Smartwool® are.
Features a light, half-cushioned outdoor sock ideal for light hiking, trail running and biking.
Ribbed cuff with ankle band for comfort.
Contoured Flex Zone on topside.
Arch band at upper and lower instep for support.
4-Degree Banded Fit System construction for performance fit.
ReliaWool™ Technology in high impact areas provide longer lasting protection to keep feet comfortable.
Strategic Mesh Zones for maximum ventilation.
Machine wash warm inside out, tumble dry low.
Crew Cut length.
Made in the USA.
Christy Sports

Smartwool PHD Outdoor Light Crew - Women's:  Featuring a women's specific design, this sock stays in place and offers a light cushion for all-day performance. The padded Achilles tab offers additional protection. Reliawool Technology in the heel and toe adds more durability than ever before.

Knit in USA of 70% Merino Wool, 28% Nylon, 2% Elastane.
New 4 Degree Elite Fit System uses two elastics for greater stretch and recovery to keep the sock in place.
Patent pending ReliaWool Technology in high impact areas provides the longer lasting protection to keep feet comfortable Flat knit durable toe seam for high burst strength.
2x1 ribbed welt.
1x1 ribbed leg.
7.5" overall height.


New, improved PhD socks are more advanced than ever! SmartWool Outdoor Light Crew socks feature innovative new fabric, a more comfortable fit and smart design details that enhance performance.

Made in USA.

With designated ventilation zones, just enough stretch to prevent shifting, and nature's premium anti-odor fiber, the SmartWool Women's PhD Outdoor Light Crew Sock is a must-have if you spend as much time outside as you do inside. The crew length works well with mid-height hikers.

Appalachain Outdoors
With just the right amount of cushioning in just the right places, the PhD Outdoor Light Crew socks from SmartWool will keep you comfortable during a quick hike on the trail or just lounging around the house.
Mountain Gear
With enough textile technology and design for an entire doctoral program, the PhD Outdoor Light Crew sock from SmartWool keeps your feet comfy, ventilated, and odor-free for a long day on the trail.

The SmartWool PhD Outdoor Crew Sock for Women proves you don't need wires and silicone to be hi-tech. You just need smarts, like the new and improved 4 Degree Elite Fit System which makes these socks even more comfortable than before. Patent pending Reliawool technology that is more durable, improves wear and makes a thousand miles underfoot nothing but a thousand miles of fresh air, good memories and great views.

Eastern Mountain Sports (EMS)
New and improved with a 4 degree Elite Fit System and ReliaWool high-density impact zones, SmartWool PhD Outdoor Light Crew Socks deliver more comfort with an improved fit and greater durability.

Fiber Content: 68% merino wool, 29% nylon, 3% elastane.
Country of Origin: Imported

Sierra Trading Post
2nds. SmartWool PhD Outdoor light crew socks are built to handle long days on your feet. Made of itch-free, moisture-wicking merino wool, the 4-Degree fit system prevents bunching for all-day comfort.

The House

Our PhD Outdoor Light Crew features Reliawool Technology for improved durability in the heel and toe and the 4-Degree Elite Fit System, to keep the sock in place and giving you all-sport versatility. Top 25 Category Product
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Review RatingNumber of Reviews
Available Color(s):Deep Sea, Wine
Country of Origin:USA
Crew height:7.5 in.
Cushioning:Light Half-Cushioned
Fabric:Knit in USA of 70% Merino Wool, 28% Nylon, 2% Elastane
Fit:Crew height
Four elastic bands:ankle band, upper and lower instep bands, and arch band keep the sock in place
Height:Crew 8.5 in.
Material:70% Merino Wool/ 28% Nylon/ 2% Elastane
Materials:68% merino wool, 29% nylon, 3% elastic.
Non Pattern:69% Merino Wool, 29% Nylon, 2% Elastane
Pattern:68% Merino Wool, 30% Nylon, 2% Elastane
Sock Height:Crew
Sock Thickness:Light
Sock Type:Hike/Trek
Sock cushioning:Light cushioning
Compare specifications to related products.

Similar Products:

SmartWool PhD Outdoor Ultra Light CrewSmartWool PhD Outdoor Ultra Light Crew$10.95 - $19.95
SmartWool PhD Outdoor Light MiniSmartWool PhD Outdoor Light Mini$8.21 - $19.95
SmartWool PhD Outdoor Medium CrewSmartWool PhD Outdoor Medium Crew$15.98 - $23.95
SmartWool PhD Outdoor Light MicroSmartWool PhD Outdoor Light Micro$10.17 - $16.95

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SmartWool PhD Outdoor Light Socks Reviews:

Positive Reviews:

Awesome Wool Socks

I did a few hikes with PhD wool socks and they turned out to be better than I thought because the socks are comfortable and left my foot blister-free after a 10 mile hike with about 35 pounds of gear. The design of the look good and the socks are true to fit. The socks does not roll down like my other wool socks and does not loosen up inside after a prolong use of time. I highly recommend them.

My only complaint is the price being a tad bit high compared to other wool socks, but a very good investment for my foot.
HJC985 at Eastern Mountain Sports (EMS) on 11/11/2012

Nice socks

These socks keep my feet dry and fit very well. They seem durable and wash well (machine washed and dried low to med). There was minimal shrinkage (but I sized up to L anticipating this, as I don't air dry them). They are warm and well cushioned. I've used them for short hikes, with boots, and everyday (though for most of my non-athletic footwear, the cushion is a bit too thick).
Patricia at Eastern Mountain Sports (EMS) on 01/01/2013

Wife loves them

My wife has 4 pairs of these and wears them for almost every activity. The PhD line of Smartwools is a superior design to every other type we have tried, breathable while being padded in all the right spots. She usually has them on for 10k's and 1/2 marathons too and has never had a foot problem while using them (unlike some other brands). Pricey but worth the investment.
sjitzin at REI on 10/10/2013
I wear Smartwool socks all year round, but especially in the winter when I am running outside. Even if my feet get wet, I don't know until I take off my shoes. My grandson asks for them for Christmas and hs birthday. He is ten and loves the way they feel on his feet. Great socks!
Dah - customer at on 01/01/2014

Love These

I love these socks. They hug my feet, are soft and comfortable, regulate foot temperature, and keep foot odor away. Also, these are the only socks I can sleep in without having to take off in the middle of the night (unlike other socks that get too hot and sweaty).
EarthWoman at REI on 11/11/2013

great sock

Most socks I have tried on for hiking are too bulky. These are just right. I also use these to down hill ski. Wool makes the difference. You really don't need a lot of cushion if your boats fit well and are well made.
hikeglacier at REI on 07/07/2012

Ilove thesesocks

I love these socks because theyfitsowell-they are made with extrastretchymaterial at critical parts,and a cushiony sole. I am allergic to woll(it makes my skin itchy),but these are minimally itchy.. They have become my winter socks.
hey Jude at Eastern Mountain Sports (EMS) on 03/03/2013

awesome socks!

I wore them all day walking around my son's scout camp, mostly Trail walking. My feet stayed dry all day. They were very comfirtable to wear and fit well.
susan ck at Campmor on 07/07/2013

Fantastic socks

I will never buy any other socks than the SmartWool brand. I want to try others now - but the PHD are incredible.
happy feet at Eastern Mountain Sports (EMS) on 11/11/2012

Very nice wool socks

The socks were thicker than expected. I bought these as gifts but liked them so much, I ordered more for myself.
AK Adventures at REI on 12/12/2013

Negative Reviews:

Warm Feet in Arkansas

We are safari people and wear them with our boots in hot/warm climates or at home in cold climates. They are a staple item for Christmas. I have introduced my adult grand daughters to the joy of warm feet here in Arkansas in the cold months, which they appreciate. I order from Campmor for sale prices in quantities for the basic hikers and some fun colors, too. I enjoy them for walking/running in the colder months. Coolmax is a wonderful product in every way.
arkyelephantlover at Campmor on 12/12/2012