Hiking & Backpacking

With classic styling, ample cushioning, and a supportive fit, our Jitterbug Crew has impressive range. Whether you’re at the office, walking a riverbank, or out on the dance floor, give your feet the youthful, nostalgic glow they deserve.

This ultra-light, non-cushioned sock provides a close, lightweight fit that acts as your second skin to minimize friction and blisters. The flat knit toe seam guarantees comfort.

This all-purpose sock was designed for rugged day hikes or moderate backpacking. An arch brace holds the sock in place and adds additional support. A flat-knit toe seam keeps you comfortable.

Check another landmark off your bucket list with the PhD® Outdoor Light Arches Print Mid Crew. This men's sock uses Indestructawool™ technology to make them one of our most durable socks yet, a Virtually Seamless® toe for in-shoe comfort, and the 4 Degree™ elite fit system, creating one of our smartest and most technical outdoor socks.

Experience durability at its peak with the PhD® Outdoor Light 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 responsibly sourced Merino wool socks have comfort covered.

Experience durability at its peak with the PhD® Outdoor Light 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 responsibly sourced Merino wool socks have comfort covered.

An ankle-high powerhouse, the PhD® Outdoor Light Mini is made for mileage. Great for long summer treks, our lightweight, best-fitting hiking sock combines support, stretch, and recovery. Featuring Indestructawool™ technology for ultimate durability and the 4 Degree® elite fit system for a dialed fit. Light cushioning offers impact protection on the road or trail, while the Virtually Seamless™ toe offers more comfort in a trail shoe.

Searching for a versatile wool sock that has it all? Look no further: the PhD® Outdoor Medium Crew offers fit, comfort and durability wrapped together in one smart sock. It features Indestructawool™ technology for ultimate durability in high wear areas, our 4 Degree™ elite fit system for a dialed fit, and our signature Virtually Seamless™ toe for extraordinary comfort in any trail shoe. Plus, the medium cushioning provides impact protection and ultimate comfort on the trail—making our PhD® Outdoor socks some of our best-fitting and most comfortable.

For the vertically inclined, the PhD® Pro Approach Crew combines carefully designed comforts with rugged purpose. Made with insights from iconic alpinist Conrad Anker, our approach mountaineering socks feature specified cushioning to help protect feet from footwear friction, our 4 Degree™ elite fit with flex zone, ankle padding that provides additional cushioning against loose rock and scree, and body-mapped mesh to help make even the most ambitious approaches more manageable.

We worked with athlete Rob Krar to create the ultimate ultra-run sock. This purpose-built sock features Shred Shield™ technology to reduce wear from toes, activity-specific minimal and targeted sole cushioning, and a new malleolus ankle cushion designed for protection on the most rugged trails. These running socks were built to go as far as you want to go, with unwavering comfort and performance. *Due to the unique printing process, each sock may vary in pattern and color from images on site and per pair

We worked with athlete Rob Krar to create the ultimate ultra-run sock. This purpose-built sock features Shred Shield™ technology to reduce wear from toes, activity-specific minimal and targeted sole cushioning, and a new malleolus ankle cushion designed for protection on the most rugged trails. These running socks were built to go as far as you want to go, with unwavering comfort and performance. *Due to the unique printing process, each sock may vary in pattern and color from images on site and per pair

Experience durability at its peak with the PhD® Outdoor Light 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.

A favorite of through-hikers and day-trippers alike, the PhD® Outdoor Light packs some serious trail power. Featuring a versatile, multi-sport design, this lightweight style includes Indestructawool™ technology for ultimate durability in high wear areas. And when it comes to comfort, Smartwool pulled out all the stops: the 4 Degree™ elite fit system provides a dialed fit and our signature Virtually Seamless™ toe offers extraordinary comfort in any trail shoe. The Mid Crew height sits at an ideal height for a low trail boot.

For a sock that has it all, look no further: the PhD® Outdoor Medium Crew offers fit, comfort and durability wrapped together in one smart sock. Featuring Indestructawool™ technology for ultimate durability in high wear areas, the 4 Degree® elite fit system for a dialed 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.

When you 've got lots of miles to cover but only want the minimum between your foot and boot, the PhD® Outdoor Ultra Light Crew is the perfect trail companion. With the new Shred Shield™ technology for reduced wear from toes, 4 Degree™ elite fit system for a more dialed-in fit, and activity-specific mesh zones for additional breathability, this sock was built for mile after mile of trail.

When you 've got lots of miles to cover but only want the minimum between your foot and boot, the PhD® Outdoor Ultra Light Mini is the perfect trail companion. With the new Shred Shield™ technology for reduced wear from toes, 4 Degree™ elite fit system for a more dialed-in fit, and activity-specific mesh zones for additional breathability, this sock was built for mile after mile of trail.

This trekking sock is ready to go far and, of course, feel good. Heavy full-cushioning provides shock absorption, offers insulation against the elements, and supports under weighty loads. An arch brace holds the sock in place and adds additional support to one of our most comfortable socks.

For the day hiker looking for a little more coverage, this hiking sock adds a small amount of cushion. An open, mesh fabric and two types of rib offer enhanced breathability and a perfect fit. Inspired by today's ultra-light hiking shoes, this responsibly sourced Merino wool sock will help change your hikes for the better.