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.
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.
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.
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.
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 DIFFERENCE
Happy 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.