Smartwool Trekking Heavy Crew Socks


Different size or color?


Add to CartUnavailableNotify MeSpecial Order
, - (Sku )
(% off)
  • Select an item for delivery date
    via standard shipping  
    Special Order: Enter a zip for delivery date
    Estimated to ship Sep 2 - details
    Enter a zip for delivery date
    Estimated to ship Sep 2 - details
    Special Order - Delivery: ,  
    Estimated, via standard shipping  
  • $ extra handling fee
  • 30-day Guarantee & Easy Returns
  • Ground only within 48 contiguous U.S. only
  • CS: Ships from
  • CS: on hand


A great choice for summer mountaineering trips or other adventures involving colder temperatures, the SmartWool Trekking Heavy Crew sock provides a haven of comfort for your feet. Heavy full cushioning surrounds the foot, a nice buffer to have when wearing the heavier, stiffer footwear usually associated with extended alpine excursions. The SmartWool fibers also have a lot to do with the fabulous comfort experienced in the SmartWool Trekking Heavy Crew sock. They have a very small micron diameter, between one-tenth and one-third the size of a human hair, making for a very soft, comfortable feel. And equally important, these same fibers move perspiration moisture at a fast clip, even while still in the vapor stage so the feet stay dry throughout the day.


  • Fabric content: 75% wool, 24% nylon, 1% spandex
  • Heavy full cushioning surrounds foot
  • 3 x 1 rib knit leg cuff provides excellent horizontal stretch and form fit
  • Arch brace knit with spandex to hold sock in place and support foot
  • Flat-knit toe seam and side panel
  • Crew height: 6 inch rise above ankle

Find More

Review Summary

4.9 out of 5

30 Reviews

  • Great design: 9
  • Great value: 7
  • Performance: 7
  • Ease of use: 4

  • Cost: 3
Comfort: 5 / 5
Durability: 5 / 5
Quality: 5 / 5
Fit: 3.2 / 5

30 Ratings & Reviews

Comfort: 5 / 5
Durability: 5 / 5
Quality: 5 / 5
FitClothes: 3 / 5
from Florida

Love these socks!
October 18, 2010

These socks are very comfortable, and really resist odors. I wore them for two days straight, just to test them out. I didn't want to take them off, but did, for hygiene. Normally, I can smell my cotton socks after just one day of use, but with these, I couldn't even smell any odor after two days of use! Highly recommended.

Pros: Great design, Build quality, Cons: Cost
Comfort: 5 / 5
Durability: 5 / 5
Quality: 5 / 5

from Fuquay Varina, NC
35-44 yrs

Another quality piece from Smartwool!
October 15, 2011

I'm a great fan of smartwool, especially of their PhD socks. Very comfortable fit, true to the size; even though they're thick cushioned, your feet stay dry in any temperature. I would recommend this product for hiking or simply for everyday use. I bought these for my trip to Kilimanjaro but the feel great and fit awesome. Overall, a solid product! Great Product! Highly Recommend!

Pros: Great design, Build quality, Performance, Ease of use, Great value

Great socks/great price/great service
January 25, 2010

Long-time fan of SmartWool. Free shipping saved me $10. Fast shipping. Thanks!

Very good for cold weather hiking.
December 21, 2006

The SmartWool Trekking Heavy Crew is very capable in cold weather hiking. Both my wife and I have use the Heavy Crew in temperatures at and below freezing. Together with a quality hiking boot, these socks provide continuous comfort and warmth for both short and long hikes. The wicking layer keeps the moisture away from your feet, keeping them very comfortable.

Comfort: 5 / 5
Durability: 5 / 5
Quality: 5 / 5
from East Central Arizona
55-64 yrs

Best thing Since sneakers !
January 16, 2012

First thing, I rarely give any thing five stars. These socks are the best, bar none. Im 6 ft. 200 lbs. ware a size 10/10.5 shoe. This sock in large fits me great. I own at least 6 pair of smartwool socks some over two years old and I havent worn a pair out yet. These are not your fathers wool socks. They slide on like a dream and wash and dry and dont shrink. This pair here are their trekking heavy crew socks and I use them in the winter when there is a lot of snow. No need for anything else as far as socks go, they keep my feet warm. You get what you pay for with these socks, there worth the money!

Pros: Great design, Build quality, Lasts forever, Performance, Great value

Comfy Socks
August 03, 2007

These are definitely the most comfortable hiking socks I've owned. The inside lining is so fuzzy and feels great against the skin. I only wish they were a bit taller...might be a bit short if you've got very tall mountaineering boots, but should be fine with hiking boots.

from Wisconsin
45-54 yrs

Great socks
January 22, 2011

I love my smartwool socks. I have several kinds for hiking, dress and skiing and they are all great. They keep my feet warm and the extra cushioning in wonderful. My toes dance with delight!

Pros: Great design, Performance
Comfort: 5 / 5
Durability: 5 / 5
Quality: 5 / 5

Best socks ever
June 29, 2011

I love these socks so much that I wish I had a dozen pairs. I bought some for my boss this past Christmas. He's an attorney but spends many hours working outside on his seven acres of property. I actually gave him half a dozen things for Christmas but the only thing he thanked me for were the socks. He said, you are right, your feet stay much warmer and more comfy in those socks! Anyway, buy a pair, you'll reach for them every time you put on your hiking boots!

Pros: Build quality, Lasts forever, Performance, Great value
Comfort: 5 / 5
Durability: 5 / 5
Quality: 5 / 5

Great Socks!
December 16, 2010

My family and I have been buying Smartwool socks for a few years now, and these are great gifts for my husband and father-in-law, especially during hunting season!

Pros: Great design, Build quality, Lasts forever, Performance
Comfort: 5 / 5
Durability: 5 / 5
Quality: 5 / 5
FitClothes: 3 / 5
from California
55-64 yrs

Warm At Last
January 11, 2011

Indoors outside and also to bed my feet are warm at last. Great socks!! *Ü*

Pros: Great value
Comfort: 5 / 5
Durability: 5 / 5
Quality: 5 / 5
from nj
18-24 yrs

Perfect Socks for cold weather
October 31, 2011

Great socks. plenty of cushion, keeps your feet warm, fits well, doesnt lose shape. I wear these socks around the house during the winter. (my house is very very cold ~55F) and occasionally outside with leather lined boots or moccasins. These work perfect in keeping my feet warm. They do not lose shape, I have been wearing them over a week straight.

Pros: Great design, Build quality, Lasts forever, Performance, Ease of use, Great value

great for multi-day backpacking
July 08, 2009

I love Smartwool, and I love these socks. I recently wore them backpacking for several days straight, and they stayed cushy, dry, odor-free, and kept their shape the whole time. My boots got a little wet on the inside when I crossed a stream, but these socks drew the moisture away from my feet. Since it was their first time out, they got a little pilly on the outside, but otherwise great performance.

Great sock!
February 12, 2010

This sock is heavy-duty yet comfortable; great for cold weather.

Excellent cold weather hiking sock
August 09, 2010

I bought 5 pairs of these when the price dropped to $11 with the additional 25% savings. Outstanding heavyweight hiking sock. I was concerned about the elasticity with the high (80% wool) mix. It hasn't been a problem yet. If it becomes a problem I can easily solve it by buying a $4 spool of elastic at the yarn store and cut elastic support anklets. I use a liner and the wicking capability with and without the liner are phenomenal. Feet have been toasty and dry during a cool weather hike near Beckley in West Virginia. Highly recommend.

my most comfortable socks, ever!
December 13, 2009

These socks provide the cushion and comfort I was looking for. I'm 66 years old and foot comfort has become increasingly important as I age. I've been using Smartwool Hiking Medium Crew for years, but these heavier socks take comfort to a new level.

Greatest product
January 25, 2010

I have been wearing smart wool socks for several years and just love them. Great product.

Really Comfortable and not too warm socks
December 27, 2007

I'm a CERT (Community Emergency Response Team)member and needed a good pair of thick socks to wear with boots that hurt my feet. When I added the SmartWool Trekking Heavy Crew socks--no more hurt feet! They are so comfortable and keep my feet warm without becoming too hot. I'm going to order more and would reccommend these to anyone.

Comfort: 5 / 5
Durability: 5 / 5
Quality: 5 / 5
FitClothes: 3 / 5
from Auburn, AL
25-34 yrs

Great socks
January 03, 2011

These are the most comfortable socks I have ever put on my feet! I have been using them for trekking and they have held up well and provided great comfort and durability.

Pros: Build quality, Performance, Cons: Cost

Very Comfortable and WARM!
January 27, 2010

I bought 3 pairs. 2 light weight and 1 heavy! These socks fit my feet perfectly and provide lots of support and warmth. I will be getting more!

Smartwool is comfortable but wears out super-quick
November 08, 2009

They wear out super fast: These feel good but cost a fortune and mine wear out in a very few weeks and develop holes everywhere---and I don't have any of the problems/multiple excuses the company offers for this wear out--Blogs and protests have complained about this problem--I wrote Smartwool to respond and make good on their online "commitment" to replace a few of these one month ago and never even got an answer--I'm curious if this "pro-Smartwool" commercial site will even allow this response to appear: I wrote a similar one and it never saw the light of day--only the rave reviews appeared.


Dependable backpacking socks
August 10, 2010

You can skip the liner with these socks. They can get little hot during summer days but wicks moisture really well to keep your feet dry.

Trekking Heavy Crew Socks (formerly Expedition)
March 04, 2009

I wear these socks year round and have been singing their praises to my husband for several years. He finally decided he had to try them and he LOVES them. I've never seen him so excited by socks! He likes the soft insides, the cushioning and the warmth without the sweat on his feet. I have narrow, boney feet and these wonderfully cushion my feet from wear and tear. Just be sure to turn them inside out when you wash them or they get some pilling over time. I would recommend these to every one!

Comfort: 5 / 5
Durability: 5 / 5
Quality: 5 / 5
from Canada
45-54 yrs

October 10, 2011

Very comfortable fit, true to the size; even though they're thick cushioned, your feet stay dry in any temperature. I would recommend this product for hiking or simply for everyday use.

Pros: Great design, Build quality, Ease of use, Cons: Cost
Comfort: 5 / 5
Durability: 5 / 5
Quality: 5 / 5
FitClothes: 4 / 5
from Oslo, Norway
35-44 yrs

Warm and comfy
December 12, 2010

These are well designed socks with good support and comfortable fit. Very warm also.

Pros: Great design, Build quality, Great value

smart wool socks
May 19, 2007

The socks are very comfortable. Great for cold weather. I have used in warm weather and they wick moisture very well. Great hiking socks

great sock, lots of cushion
September 01, 2008

lots of cushion, very comfortable

September 17, 2008

Very soft and cushioned and the inside is fluffy. I use these socks because I have foot injuries and they offer the best cushions for my feet and feel great.

November 04, 2007

I'm a delivery driver in a brown truck and I'm out in all kinds of weather during winter such as snow, slush, cold rain and these Smartwool socks are excellent. My feet stay as dry as possible and my feet never get too hot. The wool is very comfortable, durable, easy care and I never get blisters. The best all around socks for cold weather.

Comfort: 5 / 5
Durability: 5 / 5
Quality: 5 / 5

from New York, NY
45-54 yrs

Comfortable Socks
November 24, 2011

These socks keep your feet very warm in the cold and there very cushioned on the bottom. I wear them with my hiking boots when it's cold out or just around the house. There very comfortable.

Pros: Great design, Build quality, Ease of use, Great value

Best Price for Smartwool Trekking Socks! Awesome Socks!
December 07, 2009

Shopped around for the best price for thick smart wool socks. I've had these same socks for three or four or five years and it was time to replace them. The new ones are exactly the same and incredibly soft, cushy and comfortable. I'll be in them all winter.

Also Available

Smartwool Trekking Heavy Crew Socks Photo

Grey, Loden, Navy and Taupe.

Available sizes, while supplies last, include size small, size medium, size large and size extra large: s, m, l, xl.

  • Talk to Us:
    (800) 369-3949
  • We're Available:
    Mon-Fri: 7:30am-4:00pm PST
    Sat-Sun: CLOSED