Perform with the power and comfort of responsibly sourced, ZQ-certified Merino wool in Smartwool's Hike Light Cushion Crew socks.

Formerly known as PhD® Outdoor, Smartwool have updated their best hike socks to include more sustainable materials with the addition of recycled nylon, improved durability, updated mesh zones, and an even more perfect fit. But, don't worry. The fan-favorite sock technologies aren't going anywhere—offering you the comfort and performance you expect from Smartwool.

The crew height also adds extra coverage on the trails and light cushioning on the entire bottom of foot helps keep you comfortable when the ground isn't—helping you to hike on.

With full, plush cushioning, the Classic Mountaineer Maximum Cushion Crew sock is just right for your long-distance and backpacking hikes.

Its elasticized arch brace offers secure, lasting fit, and its flat knit toe seam helps with in-shoe comfort.

 Smartwool's thickest, warmest sock, this wool crew helps ensure that your feet stay comfortable, no matter how long the hike.

The Classic Hike Zero Cushion Liner Crew hearkens back to Smartwool's original construction but adds in recycled nylon for strength and durability while reducing environmental impact.

This liner has an elasticized arch brace so your foot will enjoy a secure fit, and it will give you a flat knit toe seam for additional comfort.

When you’re ready for your next hike, be sure to grab a pair of these responsibly sourced Merino wool socks to make the most of each mile on the trail.

The cushioning on the entire Performance Hike Full Cushion Crew sock provides added protection and warmth for those chillier hikes.

This year’s sock offers Indestructawool™ technology with extended durability zones for a stronger, longer-lasting sock. Add in the smoothed-out toe seams that enhance in-shoe fit and comfort, and you know your trek will be more enjoyable than ever.

So get out and get moving on those trails!

Smartwool's 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 responsibly sourced Merino wool, but still offers the unmatched comfort it did in 1994.

Elevate every hike with this cozy, capable classic.

Over 25 years ago, Smartwool 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 nylon—adding more sustainability to Smartwool's favourite socks. They’re also made with responsibly sourced, ZQ-certified wool that was grown with a focus on ensuring environmental, social, and economic sustainability while also taking the best care of our Merino sheep.

This is a women's cozy, capable classic that is never going out of style.

Smartwool's 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™ technology for enhanced durability, our 4 Degree™ Elite Fit System for a dialed-in, performance-oriented fit, and our Virtually Seamless™ toe for maximum in-shoe/boot comfort.

Smartwool have updated their hike line by improving mesh zones for additional breathability, as well as creating a new ply structure that reduces pilling while enhancing hand-feel and comfort. Not to mention, Smartwool's best-feeling, best-fitting hiking socks are now made with recycled nylon—making these socks more sustainable than ever. Now that's something you can feel good in and about.

Be sure to start your next run with footwear that offers as much comfort as possible.

Smartwool's Run Targeted Cushion Ankle Socks are designed with cushion on the most impact-prone areas - the ball and heel of the foot - as well as other feel-good features like mesh zones for breathability, and Virtually Seamless™ toe.

Plus, because they’re made with responsibly sourced Merino wool, they’re naturally odor-resistant and temperature-regulating. And, with Indestructawool™ technologies, they’re built to last, mile after mile.

Smartwool's Women’s Run Zero Cushion Low Ankle socks offer the comfort and durability that will help make every mile feel good. Indestructawool™ and Shred Shield™ technologies increase the sock’s durability, while the 4 Degree™ elite fit system, Virtually Seamless™ toe, women's specific fit, and breathable mesh zones increase its comfort.

No matter if you’re hitting the trail, the pavement, or the treadmill for some good old-fashioned training miles, be sure your gear includes the sock that will help you stay comfortable on every stride.

Smartwool's Classic Hike Full Cushion Crew socks focus on comfort and durability, so you can go farther on every hike.

Responsibly sourced, ZQ-certified Merino wool keeps things soft, while recycled nylon keeps it all sustainable. And full cushioning on the entire sock adds the warmth and protection you need for any trail.

Stay comfortable out there with our updated women's Classic Hike socks.

Meet the new and improved Women's Merino 250 Base Layer Crew.

Smartwool have updated this 100% Merino wool fan-favorite with an enhanced fit to improve functionality while elevating aesthetics. The addition of shoulder panels its flatlock seam construction helps prevent chafing and increases your comfort level.

Add one of Smartwool's best base layers for cold weather to your winter wardrobe and experience the difference the next time you go skiing, hiking, climbing, or biking.

Smartwool have updated the fit of their Men's Classic Thermal Merino Base Layer 1/4 Zip to improve functionality while also enhancing aesthetics.

As one of their heaviest base layer tops and best base layers for cold weather, this garment uses 100% responsibly sourced Merino wool, shoulder panels, and a flatlock seam construction to help minimize chafing as well as help keep you comfortable and temperature regulated as you enjoy high-intensity skiing, hiking, running, and more.

Spring skiing or summer camping?

The Classic All-Season Merino Base Layer Long Sleeve is game for either. With Smartwool's Core Spun technology, they've wrapped lightweight Merino around a nylon core for added durability, while still keeping the comfort of ultra-soft, responsibly-sourced Merino next to skin.

Smartwool added smooth flatlock seams to help minimize chafing and offset shoulder and side seams to lie smoothly beneath pack straps.  No matter the season or the activity, this base layer is made for it.

Designed for a perfect fit on the foot and in the shoe, our Kids’ Hike Light Cushion Crew Socks will help your kids’ feet feel comfy from the trailhead to your destination.

Because they’re made from Merino wool, they offer natural odor control, breathability, and durability. Plus, they’re made with a flat knit toe seam and an elasticized arch brace for comfort and support, which will help ensure a happy hike.

An all-season favorite, the Classic All-Season Merino Base Layer Long Sleeve can be sported as a base layer in the fall or summer when it's time to go backpacking.

This base layer features Core Spun technology—which features Merino wrapped around a nylon core for added durability while still keeping the comfort of ultra-soft, responsibly sourced Merino next to skin.

Smartwool's Raglan sleeves eliminate shoulder seams for perfect comfort under a pack, and smooth merrow stitching wraps from side to front to keep you looking as good as you feel.

Putting in mile after mile on training runs requires comfortable footwear, starting with your socks.

Smartwool's Women’s Run Targeted Cushion Ankle Socks are designed to fit well, feel great, and perform even better. With a women’s specific fit, engineered mesh zones for breathability, and Indestructawool™ technology with extended durability zones, this sock covers all of the fit, comfort, and performance bases. What’s even better is that it’s made with responsibly sourced Merino wool, so you know you’ll get softness, odor control, and temperature regulation.

So get on out there and make each mile count!

Experience the ultimate combination of performance and comfort with ZQ-certified Merino wool in our updated Hike Light Cushion Crew socks. Now featuring sustainable materials, improved durability, and a women's-specific fit, these socks are designed to provide all-day comfort and natural performance while offering added coverage and cushioning for your feet on the trails. Keep your feet happy with our top-rated hiking socks.

Smartwool's fullest, plushest sock offers maximum cushioning for maximum comfort on long hikes or backpacking trips.

Plus, with its stay-put arch brace and comfort-driven toe seam, you won’t notice it’s there. Constructed of responsibly sourced Merino wool blended with recycled nylon, this sock is sustainably durable, to help reduce your environmental footprint.

Meet the better-than-ever Men's Classic Thermal Merino Base Layer Crew.

Smartwool have updated this 100% Merino wool fan-favorite with a new fit to improve functionality while enhancing aesthetics. Shoulder panels eliminate top shoulder seams and a flatlock seam construction helps prevent chafing.

Add one of Smartwool's best base layers for cold weather to your winter wardrobe and experience the difference the next time you go skiing, hiking, climbing, or biking.

Elevate every ski day with our Women's Ski Full Cushion OTC Socks. These women's wool ski socks are packed with warmth, durability, and breathability, so you're always feeling your best on the mountain. Gear up for longer days on he slopes with this pair of Merino wool ski socks.

Smartwool's Women's Classic All-Season Merino Base Layer Bottoms are the perfect layer to put on for your warm-weather adventures.

Made of lightweight, breathable Merino, these base layer pants have an updated fit that improves functionality while enhancing aesthetics for a wide range of body shapes. We wrapped our super-soft, responsibly sourced Merino around a nylon core to give it added durability, so it can keep up with you.

Wherever you're going and whatever you're doing, our lightest weight base layer bottoms are perfect for adventures during all seasons.

Take on the slopes with a little style and a lot of comfort with the Women's Ski Targeted Cushion Pattern OTC Socks. These Merino ski socks feature a vibrant mountain print, our most advanced Indestructawool™ technology for enhanced durability, and our 4 Degree™ elite fit system for an unmatched performance fit. Plus, body-mapped mesh zones for added breathability. Make a statement on the slopes this season with your new favorite performance socks.

Seize the ski day with Men's ski socks that help you stay outside longer — naturally. Our Ski Targeted Cushion OTC Socks puts cushioning and body-mapped mesh zones everywhere you need it for maximum comfort and breathability in any boot. Next time you hit the slopes, bring the natural performance of Merino wool along for the ride.

Running can be grueling, but that doesn’t mean it has to be completely uncomfortable.

With our Zero Cushion Low Ankle run socks, you get the comfort and durability that will help make every mile feel good.

From the Virtually Seamless™ toe to the breathable mesh zones and from the Indestructawool™ technology to the Achilles heel tab to reduce slippage, this sock offers purpose-driven features that help you get the work done.

So if you’re ready to hit the trail, the pavement, or the treadmill for some good old-fashioned training miles, be sure your gear includes the sock that will help you stay comfortable for the long haul.