Our best fitting, most advanced run socks yet, we packed years of testing, prototypes and running smarts into these socks. Featuring Light Elite cushioning in the ball and heel of the foot for ultimate shock absorption with minimal in-shoe volume, men’s-specific mesh ventilation zones and a Virtually Seamless™ toe.

We've put all of our smarts into these new and improved Women's PhD® Run Ultra Light Striped Micro socks. You won't break your stride, thanks to our Indestructawool™ technology designed for added durability and an Achilles tab designed to help prevent sock slippage. And by adding our brand-new Shred Shield™ technology to our running socks, the wear and tear from toes is reduced, helping you push toward your finish line and achieve higher mileage.

The Magpie takes flight in this brand-new design. The lively pattern and ultra-comfortable Merino wool are just the start of how amazing these socks are. We've added a Virtually Seamless™ toe, a supportive arch brace, and a women's-specific fit to make an unbelievably soft, colorful pair of socks that are sure to brighten your day.

Summer nights lead to cozy feet at sunset, thanks to our Women's Hike Light Summer Nights Print Crew. Light, half cushion is perfect for moderate hiking or for relaxing around the campfire after you've dropped your pack for the day. An arch brace helps to hold the sock in place and provides additional support.

Our Women's Hike Striped Light Crew socks use a light, half-cushion that is perfect for moderate hiking. Designed for a woman's foot, these socks feature an arch brace that holds the sock in place and adds additional support. Flat-knit toe seams help to keep you comfortable throughout the day.

Experience durability at its peak with the Women's PhD® Outdoor Light Pattern Crew. Featuring Indestructawool™ technology, a patent-pending wool-based durability construction, these socks are ready for any adventure on your list. Plus, with redesigned mesh zones, a Virtually Seamless™ toe, and the 4 Degree™ elite fit system, these socks have comfort covered.

For a sock that has it all, look no further: the Women's PhD® Outdoor Medium Pattern Crew offers fit, comfort, and durability wrapped together in one smart sock. These socks feature Indestructawool™ technology for ultimate durability in high-wear areas, the 4 Degree™ elite fit system for a dialed-in fit, and our signature Virtually Seamless™ toe for extraordinary comfort in any trail shoe. Medium cushioning provides impact protection and ultimate comfort on the trail.

Our proprietary 360-degree printing process kicks our Women's PhD® Run Light Elite Print Crew socks up a gear. Featuring Light Elite cushioning in the ball and heel of the foot for ultimate shock absorption with minimal in-shoe volume, women's-specific mesh ventilation zones, and a Virtually Seamless™ toe, these socks are sure to help you go far and feel good.

Like the design. Love the fit. Our Women’s PhD® Ski Light Pattern sock features our 4 Degree™ elite fit system, which uses two elastics for greater stretch and fast recovery while you fly down the slope, and our women's-specific fit, a narrower profile that better fits women’s feet. Light shin and foot cushioning help ensure all-day comfort. And our Indestructawool™ technology helps make sure these socks’ll last.

Why not perform like a pro? The Women's PhD® Pro Free Ski elevates boot fit, durability, and comfort. With features like a Women's specific fit, contoured shin and ankle cushioning, and a flat toe box, your feet will stay nice and comfy in your boots as you tear down the slopes.

Professional skier Chris Benchetler's designs come to life on these performance ski socks, combining vibrant prints and technical features like our Virtually Seamless™ toe for in-boot comfort, body-mapped mesh zones for added breathability, and our 4 Degree™ elite fit system for a dialed-in, performance-driven fit, to help you go far and feel good.

Hit the slopes in style. The Women's PhD® Snow Medium socks add extra personality to the targeted cushioning on the shin and calf for riding heel and toe side, body-mapped mesh zones, and 4 Degree™ elite fit system found in our Merino wool ski socks. Performance is always in fashion with this Bryan Iguchi design.