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  • Extra-thick 3 x 1 knit with mid-calf design provides extra protection and a snug fit
  • Natural merino wool features long, silky fibers for extra warmth and comfort without wool's itchiness
  • High-density sole padding cushions against shock, blisters and abrasions; high-density padded insteps and shins protects against lace pressure
  • Lycra® spandex arch braces for increased support and comfort
  • Rib-knit welt top and Lycra spandex braces above the ankle help keep socks up for a wrinkle-free fit and less chance of blisters
  • Flat-knit side panels add breathability and ventilation to keep feet comfortable
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Discount will be applied when you check out. Offer not valid for sale-price items ending in $_.3 or $_.9.

View all Smartwool Men's Hiking Socks

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Best Use Mountaineering, Hiking
Fabric 80% merino wool/19% nylon/1% elastic
Sock Height Crew
Sock Cushioning Heavy Cushioning
Moisture Wicking Yes
Gender Unisex

Size chart

Rated 4 out of 5 by from So warm I forgot I had feet Great product! In terms of warmth, they hold heat all day. I spent a day on the slopes in Colorado with them and never had any issue. Usually, my feet get cold a few hours into any outdoor activity in the the winter, but with these I never noticed any creeping coldness. However, with the good comes the bad. The reason I gave them 4 stars was because they fit a bit large. While they are super warm the elastic band at the top that fits around the calf is the only part of the sock that seems to stay formed around your leg. Everything else fits loosely. Although there is this issue, the primary reason for purchasing this sock is warmth and under that criteria it passes. I would recommend this sock.
Date published: 2014-01-31
Rated 5 out of 5 by from Must have Summit Sock! This sock coupled with a good liner (I tend to size my liners one size smaller so they don't bunch) is the perfect combination for a summit climb. Wore these on Mt Adams this past summer and my feet stayed perfectly warm in my old set of Raichle boots (didn't have enough to break in my new La Sportiva's). This is warm sock, and does a good job wicking away the moisture. Also they are bulky. So if you hike the year round in a medium to heavy hiking/backpacking sock, this sock is one-up from that. Don't try to cram you foot into a snug boot (I buy mine 1/2 size larger for this reason), it will defeat the purpose and keep your feet cold. They are spendy, but this will be the one and only pair of winter/mountaineering socks you'll ever need to own. Hike on!
Date published: 2013-11-30
Rated 5 out of 5 by from Great Hot or Cold... I have worn these socks on a daily basis in Danner work boots summer and winter, and inside a pair of White's Pac-Boots in extreme cold conditions for the last 5 years while working in the forest. I wear a fresh pair each day, and with weekly washing they have held up great.I keep about 6 pair on hand, and I have only had to replace them about every 18 months on average.Drying them in the dryer takes a toll on the elastic in the upper part of the socks over time.They are a lofty sock and wick moisture away from your skin in hot or cold to keep your feet comfortable, and give additional cushioning to your feet.
Date published: 2009-08-05
Rated 5 out of 5 by from Very good socks for hiking I bought this socks for hard tracking with backpack over 20 kg and radial excursions to peaks. It have been tested in the winter outdoor event where we pass from 1200 up to 3095 meters, temperature was from -3 to -12 celcius degree. And it was snow up to 60 cm. I have a little problems with cold legs only at night when we stay for two hours while waitings for ropes mounted. All other time my feets was dry and warm. Finally it is only socks I have no any blisters with my Salewa Bison GTX trecking boots! I planned to use them one day only but feel very comforatable for more than 3 days. Now I planning to buy two additional pairs for everyday outdoor usage.
Date published: 2012-01-15
Rated 2 out of 5 by from Fell short Close, but no cigar. These are nice socks: warm and comfortable. I wish they were better crafted. They fall about 3-4 inches short of being over the calf height, as I expect mountaineering socks to be. And, they are not well crafted enough to stay up on their own otherwise. They fall, and they bunch up at the top of your boots. I am 5'10", average build, boot 12D. I tried the appropriately sized XL. I really wish they were crafted/fit better. They will be nice for lounging around the house, but not for out in the field.
Date published: 2014-09-10
Rated 5 out of 5 by from Worth Every Penny I use these socks on a daily basis in the fall, winter, and spring. After wearing the first pair over and over, I decided that I should get more before I wear out the first pair. I own 3 pairs to cycle through the week. They are cushy, very comfortable, and keep your feet warm and dry. After a long hike with a heavy pack, it's my legs that are hurting, not my feet. I prefer these socks over every other pair of socks I have tried, besides the SmartWool Hiking socks for the summer. A+
Date published: 2014-01-27
Rated 5 out of 5 by from Great Cold Weather Sock These Are the warmest socks I have ever owend! I primarily wear them under my fishing waders for winter fly fishing in Colorado tailwaters that avrage 30-45 deg December-March. I have also used them for cold weater hiking and camping.
Date published: 2012-12-11
Rated 5 out of 5 by from Long lasting good quality sock. I've had some of my SmartWool Mountaineer Socks for a decade now. They do loosen up over time, and my older ones aren't really suitable for hiking anymore, but they're still just fine for casual use in the winter or wearing around the house. A few have worn through the heal, but again I still have some from my original decade old batch that have been used a lot and haven't worn through. Overall they are very durable and will last you and stay serviceable for years. The price is offset by the number of seasons they'll last you. Only downside is that they're pretty bulky.
Date published: 2011-12-09
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Does this come in size Small? What are women with small shoe sizes supposed to wear? =/

Asked by: OptOutside
Unfortunately, we don't have this sock available in size small. We do offer the similar REI Co-op Merino Wool Expedition Socks in size small.
Answered by: REIservice
Date published: 2017-01-20

Any idea how many miles these socks maintain their cushion properties? Mine are still looking good and show no wear or tear after 1000+ miles - but I wonder if one should be replacing them earlier? I sense the "padding" is less...

Asked by: Andy Schmidt
Smartwool does not offer a guide as to how many miles you can wear the socks before you should replace them. If they are comfortable to you right now, I suggest you continue wearing them as long as they are comfortable.
Answered by: REIservice
Date published: 2017-01-28

Hi!  Just got these & wondering on care? Can I wash in washing machine & what temps? Dryer too? It has 2 pictures that I don't know what they mean. 

Asked by: Lars5
These socks can be machine washed in warm water on the gentle cycle. Do not use any bleach, do not iron and do not dry clean. They can be tumble dried with low heat or hung to dry.
Answered by: REIservice
Date published: 2016-11-21
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