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Darn Tough
Mountaineering OTC Extra Cushion Sock - Men's

4.333333333333333 out of 5 stars
3 Reviews


Size Chart


Why We Like The Mountaineering OTC Extra Cushion Sock

When other hikers start turning back, you keep going strong in comfort with the help of the Darn Tough Mountaineering Over-The-Calf Extra Cushion Sock. This sock features a heavyweight merino wool blend and thick cushioning to help you laugh in the face of icy winds, sideways sleet, and treacherous terrain.

Unlike other socks built for extreme weather, this one features Darn Tough's streamlined performance fit so it still fits comfortably in your boot. Merino wool regulates temperature to maintain comfort from the trailhead to the peak, nylon adds durability, and Lycra maintains stretch and recovery so the fit doesn't fade over time. This sock also features Darn Tough's thickest, highest-density cushioning to ease impacts from rugged terrain and ease the burden of fully-loaded packs.


  • Heavyweight wool sock for the coldest, wettest conditions
  • Merino wool naturally regulates temperature and resists odor
  • Nylon and Lycra added for durability and stretch
  • Extra cushion for rugged terrain and heavy packs
  • Performance fit for no slipping, bunching, or blisters
  • Proudly made in Vermont, USA
  • Item #DRN008C
74% merino wool, 24% nylon, 2% Lycra
Manufacturer Warranty

Overall Rating

4.5 based on 3 ratings

Review Summary

1 Stars - 0 reviews
2 Stars - 0 reviews
3 Stars - 1 reviews
4 Stars - 0 reviews
5 Stars - 2 reviews

Fits Slightly Large

Screen reader users: the following list provides a visual scale to illustrate the product fit. Please refer to the heading above for the fit type in text.
Runs smallTrue to sizeRuns large

What do you think about this product?


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5 out of 5 stars

March 6, 2022

These stay up

I've put it through the wringer
Size Bought:
5' 10"

I have tried many Darn Tough OTC socks. This is the first pair that actually stays up. Tried both the Mountaineering and Tactical OTC socks and these are nice, thick and stay up.

Troy O
5 out of 5 stars

November 25, 2020

Great sock for all your needs

I've used it several times
Size Bought:
5' 7"

I originally bought these socks with the intent of using them for back country skiing and mountaineering, but because of how nice these socks are I've been wearing them almost every day. They performed very well at 35 degrees while crosscounty skiing, flexed well, kept my feet warm but not toasting, and the best part, No smell whatsoever. I've worn these without washing them almost consistently for about 6 days without smell (gross, I know). About the only complaint I could come up with is the fit of these socks. I'm about a 8.5 men's and ordered medium which says it covers feet sized 8 to 9.5 . There's a noticable amount of extra sock at the end. I can normally pull the sock up a little higher but then the heel part doesn't sit quite right. It also occasionally slides down my shins but these are very picky things and I normally don't notice these things much throughout the day. If you think you may be bothered by this then I'd maybe recommend you buy a size down if you are like me at the middle to lower range of your suggested size. All in all this is a great sock and I will be wearing these a lot. I can't comment on durability yet since it has only been a week since I got them but considering they have a lifetime no questions asked warray, I'm not too concerned. I will update this review after I really get some use into these.

Joshua H
3 out of 5 stars

October 13, 2020

Declining quality

I've used it several times
Size Bought:
5' 10"

My second pair of Darn Tough OTC Mountaineering socks and the quality has declined dramatically. The first pair has a much thicker foot sole which is entirely red. These are red on the toe and heel and are so thin that it affects boot sizing. My first pair weighs 175 grams after many washings. The new pair weighs only 160 grams after the first wash.