Thermal Socks | Warm Socks

The Outdoor series was designed for running and hiking on rugged trails in unpredictable weather. Newly upgraded to Merino wool construction, the O...

Our Hike Full Cushion Crew socks, formerly PhD® Outdoor, use cushioning on the entire sock to help maximize warmth and protection. These responsibl...

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...

Over 25 years ago, we invented the original Merino wool performance sock—the Classic Hike. The Classic Hike remains mostly unchanged and certainly ...

Our Classic Hike Full Cushion Crew socks focus on comfort and durability, so you can go farther on every hike. Responsibly sourced, ZQ-certified Me...

Formerly called PhD® the new Smartwool Hike represents Smartwool’s newest and most up-to-date performance hike socks. With a mid crew height and a ...

Nothing says "go far. feel good.™" like our updated Hike Full Cushion Crew socks (formerly known as PhD® Outdoor)—designed to help you hike how you...

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...

Over 25 years ago, we invented the original Merino wool performance sock—the Classic Hike. The Classic Hike remains mostly unchanged and certainly ...

Get a pair of our most durable, best-fitting mountaineering socks for your next adventure. An arch brace holds the sock in place and extra-heavy cu...

Light cushion meets heavy durability in our Hike Light Cushion Winding Trail Crew Socks. Made to help keep you comfortable from trailhead to summit...

Our Hike Light Cushion Crew, formerly PhD® Outdoor, is designed to help take care of your feet and elevate every hike. We've updated our best hike ...

Step up your everyday sock game with our Everyday Solid Rib Crew Socks. These Merino crew socks feature a "stay put" fit, enhanced durability, and ...

Perfect fit. Powerful durability. That's what you get when you put on our responsibly sourced Merino wool women's Hike Light socks. Formerly known ...

Our Classic Hike Full Cushion Crew socks focus on comfort and durability, so you can go farther on every hike. Responsibly sourced, ZQ-certified Me...

Our Hike Full Cushion Crew socks, formerly PhD® Outdoor, use cushioning on the entire sock to help maximize warmth and protection. These responsibl...

The Outdoor series was designed for running and hiking on rugged trails in unpredictable weather. Newly upgraded to Merino wool construction, the O...

Meet the one sock you'll need all winter. These wonderfully comfy socks give a nod to classic business sock but offer the comfort and benefits of m...

Perfect fit. Powerful durability. That's what you get when you put on our responsibly sourced Merino wool women's Hike Light socks. Formerly known ...

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 t...

Put your feet first with the Everyday Margarita Crew Socks. These premium Merino socks feature a secure fit for all-day comfort, plus Shred Shield ...

Feel the peak of hiking comfort with our Hike Targeted Cushion Ankle Socks. Designed with our top sock technologies and cushioning in key areas, ke...

Feel the peak of hiking comfort with our Hike Targeted Cushion Ankle Socks. Designed with our top sock technologies and cushioning in key areas, ke...

Our Hike Light Cushion Crew, formerly PhD® Outdoor, is designed to help take care of your feet and elevate every hike. We've updated our best hike ...

Perfect fit. Powerful durability. That's what you get when you put on our responsibly sourced Merino wool women's Hike Light socks. Formerly known ...

Bring a little more Merino to your every day with the Women's Everyday Cable Crew Socks. These cozy Merino crews feature a slim fit for less bulk a...

Our Hike Full Cushion Crew socks, formerly PhD® Outdoor, use cushioning on the entire sock to help maximize warmth and protection. These responsibl...

Our Hike Light Cushion Pattern Ankle Socks bring you enhanced features to maximize comfort and help you get after it at the highest level. We've ex...

This crew will give your foot the ultimate in comfort for any hike. With extended durability zones and updated mesh zones, this sock helps provide ...

Hike how you like in our responsibly sourced, ZQ-certified Merino wool Hike Light Cushion socks. These hiking socks are packed with all our tried-a...

A little cushion can go a long way. And our Women’s Hike Light Cushion Mountain Moon Crew Socks are designed to have just the right amount of comfo...

Support your feet through all types of trails in the Women's Hike Targeted Cushion Crew Socks. This women's specific fit is designed for precise cu...

Our Hike Light Cushion Crew, formerly PhD® Outdoor, is designed to help take care of your feet and elevate every hike. We've updated our best hike ...

The most rugged trails call for the most dense cushioning. That's why you need a pair of our Hike Full Cushion Lolo Trail Crew Socks in your sock d...

Our Hike Light Cushion Crew, formerly PhD® Outdoor, is designed to help take care of your feet and elevate every hike. We've updated our best hike ...

Our new and improved Hike Light socks, formerly PhD® Outdoor, offer a women's-specific fit and bring you enhanced features to maximize comfort and ...

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 Merin...

Put your feet first with the Everyday Margarita Crew Socks. These premium Merino socks feature a secure fit for all-day comfort, plus Shred Shield ...

Our Classic Hike Full Cushion Crew socks focus on comfort and durability, so you can go farther on every hike. Responsibly sourced, ZQ-certified Me...

The Everyday Classic Dot Ankle Boot Socks and your favorite ankle boots are a match made in heaven. These premium ankle socks feature a secure fit ...

Get that warm and cozy winter feeling all year long with the Women's Everyday Traditional Snowflake Crew Socks. Featuring a unique snowflake patter...

Find your comfort zone on every hike with our Women's Hike socks. Packed with all our tried-and-true sock innovations, like our Indestructawool™ te...

Support your feet through all types of trails in our Women's Hike Targeted Cushion Ankle Socks. Feel targeted cushioning where you need it most, wi...

With full, plush cushioning, the Classic Mountaineer Classic Edition Max Cushion Second Cut™ Crew Socks are just right for your long-distance and ...

Nothing beats that panoramic view from the summit. Except maybe the enhanced comfort and durability of our Hike Light Cushion Panorama Crew Socks. ...

A little cushion can go a long way. And our Women’s Hike Light Cushion Mountain Moon Crew Socks are designed to have just the right amount of comfo...

A little cushion can go a long way. And our Women’s Hike Light Cushion Mountain Moon Crew Socks are designed to have just the right amount of comfo...

In black or white, the Classic Hike Zero Cushion Liner Crew hearkens back to our original construction but adds in recycled nylon for strength and ...