Smartwool® PhD® Socks
Our category-defining line of elite performance Merino wool socks.
They are the epitome of our ‘go far, feel good’ philosophy. We’ve spent over two decades designing, testing, and refining the activity-specific performance sock innovations and technologies incorporated into each pair of Smartwool® PhD® socks in order to make them the one variable you won’t have to worry about.
They are the x-factor, the multiplier, and the key to the equation.
Indestructawool™
technology
Designed to break limits
Our new, patent-pending Indestructawool™ technology isn’t just something we added to our performance socks, but a whole new way to build them. We’ve developed a new, much more durable knitting technique that enables 30% more choss-filled approaches, gut-wrenching descents, and paradigm-shifting summits. You push yourself to new limits, so we thought we’d push our Smartwool® PhD® socks to new ones too.
4 Degree™
Elite Fit
X marks the spot
The iconic x-patterned 4 Degree™ elite fit is one of our key technologies. It unites all activity-specific Smartwool® PhD® socks from cycle to mountaineer and beyond. It’s our locked-in, blister-repellent, ready-to-go platform that enables less slippage and more summits—helping you to not only go far, but to go fast, go freely, and go ferociously.
Activity-Specific Mesh Zones
Our ventilation zones were made to dump heat and help keep you on your feet longer so you can enjoy even more road/trail/climb time.
Women's Specific Fit
We’re not just changing our socks’ color to pink and calling it good. Our industry-leading women’s specific fit is crafted to provide more comfort and performance for women with its narrower fit and shallower heel.
Virtually Seamless™ Toe
This feature is knit to minimize blisters, hot spots, and in-shoe discomforts while you cycle, run, and hike your way into the wilderness.
Dialed-in Cushioning
Whether you want an extra buffer from the trail or like to run light and fast, we designed our different cushioning levels to accommodate your needs.
ZQ-Certified
Merino Wool
After 25 years, Merino wool is still our secret sauce. It helps regulate body temperature, moves moisture away from your skin at a vapor level, and resists odors. Our PhD® socks even use higher-quality, finer Merino wool in order to further increase durability and softness.
THE ZQ DIFFERENCEHappy sheep grow better wool
ZQ-certified wool is a New Zealand program that ensures the highest-quality fibers while elevating animal welfare, environmental care, and social sustainability. It’s good for our products and even better for the sheep.
