Unisex

An ankle-high powerhouse, the PhD® Outdoor Light Mini is made for mileage. Great for long summer treks, it combines support, stretch, and recovery. Featuring Indestructawool™ technology for ultimate durability and the 4 Degree™ elite fit system for a...

An arch brace holds the sock in place and adds additional support, while a flat-knit toe seam keeps you comfortable throughout the day. Perfect for moderate hiking or aggressive walking.

Our Classic Hike Extra Cushion Crew sock features a dense cushion for adventurers who need more padding in their favorite hiking shoe or boot. This "go far. feel good." originator is getting an eco-friendly makeover thanks to recycled nylon and...

The PhD Outdoor Light micro is made for the trail. Featuring Indestructawool technology for ultimate durability, we've designed these socks to outlast your greatest adventures. And with features like mesh zones for maximum breathability, a Virtually...

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 our new Shred Shield™ technology for reduced wear from toes, 4 Degree™ elite fit system...

If you're looking for over-the-calf warmth and comfort while skiing, our PhD® Ski Medium socks should do the trick. With our Indestructawool™ technology for enhanced durability, our Virtually Seamless™ toe for enhanced comfort, and our 4 Degree™ elite...

We invented the first Merino wool performance sock, but we'll never stop trying to make it better. Our Classic Hike socks are getting upgraded and it starts with recycled nylon. The first-ever Merino wool hiking socks are now made more sustainably than...

Over 25 years ago, we invented the original Merino wool performance sock-the Classic Hike. The Classic Hike remains mostly unchanged and certainly unmatched in comfort. But today, it’s getting upgraded. And that upgrade starts with recycled...

Perform with the power and comfort of responsibly sourced, ZQ-certified Merino wool in our Hike Light Cushion Crew socks. Formerly known as PhD Outdoor, we've updated our best hike socks to include more sustainable materials with the addition of recycled...

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...

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...

When you're out there, the last thing you want to think about is your feet. That's why we made the PhD® Pro Light Crew with Indestructawool™ technology, a 4 Degree™ elite fit system, and body mapped mesh vents for breathability. So you can escape without...

Perfect fit. Powerful durability. That's what you get when you put on our Hike Light socks—formerly known as PhD® Outdoor. Featuring our top sock technologies, dialed-in fit systems, updated mesh zones, and extended durability zones, we've upgraded these...

The elasticized arch brace of the Classic Hike Full Cushion Solid Crew will ensure a secure fit while you hike. But that’s not all there is to like about this classic sock. You’ll also enjoy a flat knit toe seam for in-shoe comfort as well as enhanced...

Hit that new trail in the Performance Hike Light Cushion Low Ankle sock, and you’ll be smiling from start to finish. This responsibly sourced Merino wool sock is enhanced with the 4 Degree™ elite fit system for a dialed-in, performance-oriented fit...

Get double the comfort, double the durability, and double the Merino with our Athletic Light Elite 2 Pack. These men's socks use targeted cushioning around the toes and heel along with our Smartwool® 2 Degree fit system and ankle support to help keep...

Our Hike Full Cushion Crew socks, formerly PhD Outdoor, use cushioning on the entire sock to help maximize warmth and protection. These responsibly sourced, ZQ-certified Merino wool hike socks are built with our top sock tech, including Indestructawool...

Do what feels natural in our new Hike Light Crew. Formerly known as PhD Outdoor, we've added enhanced features to our responsibly sourced, ZQ-certified Merino wool socks to help you stay comfortable, breathable, and able to hike any way you like...

Our new and improved Hike Light socks, formerly PhD Outdoor, bring you enhanced features to maximize comfort and help you get after it at the highest level. We've extended the durability zones to make them cover even more of the sock–offering the same...