REI Co-op  Mountain Merino Wool Lightweight Quarter Socks

$16.95

Give your hiking feet the comfort and cushioning they need with these REI Co-op socks. Lightweight merino wool provides a summer-weight feel. Nylon reinforcements create a durable exterior.

Color: Blue Nights
please select a Size
Fits slightly large based on reviews
Quantity
Select size for delivery dates

Members get an estimated 10% back on this item as a part of your annual .

Members get an estimated 10% back on this item as a part of your annual .
To buy,  sign in as an REI Co-op Member or join now.

Features

  • Merino wool is naturally breathable, sweat-wicking, quick-drying and odor-resistant
  • Nylon reinforcements provide extra durability at high-wear heel and toe areas
  • LYCRA® spandex integrated for all-day support and comfort
  • Merino wool cushioning placed at heel, toe and bottom of foot for a summer-weight feel
  • Snug, active-inspired fit keeps socks securely in place to reduce movement and fabric stretch
  • Ribbed arch support reduces foot fatigue
  • Seamless toe closure to reduce chafing and blisters
  • Machine wash in cold or warm water; do not use bleach or fabric softener; tumble dry low
  • Made in USA with imported and domestic yarns
  • REI Co-op brand is certified to The Climate Label; we actively fund efforts to reduce carbon emissions across our business and support climate projects around the world

Made in USA.

View all REI Co-op Men's Hiking Socks

Technical Specs

Best Use

Hiking

Fabric

72% merino wool/26% nylon/2% LYCRA® spandex

Sock Height

Ankle

Sock Cushioning

Light Cushioning

Quick Drying

Yes

Moisture Wicking

Yes

Gender

Unisex

Sustainability

From a Climate Label Certified brand

Reviews

11 reviews with an average rating of 3.7 out of 5 stars

25% 1 of 4 reviewers recommended

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Average Overall Fit Rating

Runs SmallRuns Large
TahoeBen
Location:Tahoe
Age:35–44
Typical Shoe Size:Mens 10.5
Rated 2.0 out of 5 stars
2 weeks ago

Highly disappointed

I wear mostly REI or darn tough Merino wool socks, these are knit so poorly, they bunch up under my feet. They don’t hug my feet like most of my other socks. I wore them once to work and they were so uncomfortable. My feet were falling asleep at my desk. The pressure from the bunched up fabric pushed up on my arch causing discomfort throughout the day. I feel socks are one of those things you shouldn’t think about while wearing them. I will return these and get a pair of darn tough

Age:35–44
Typical Shoe Size:Mens 10.5
Oregon buyer
Rated 1.0 out of 5 stars
1 month ago

NOT "hiking" socks--just thin cushions

So by cutting the word "hiking" out of the description, REI now peddles these thin socks--hoping we won't notice the difference? I double-checked past orders, and what used to be billed as "Lightweight Quarter Hiking Socks" now deletes that critical word and a good half of the cushioning--but at the same cost as the full-cushioned models. My husband noticed the difference immediately. Unfortunately, he really likes the full-cushioned versions. Now I need to source socks somewhere else. Very disappointing.

AKwander38
Rated 4.0 out of 5 stars
2 weeks ago

Almost a great sock..

Overall an excellent sock for warm weather hiking in low-cut shoes. Like other reviewers, I've detected a reduction in quality, e.g., the newer socks are definitely thinner though merino wool is listed as 72%. Since my shoe size is 12.5, I always buy the next larger size but these socks have always run smaller. All said, this sock is worth purchasing and have earned 4 Stars.

Sloamble
Rated 1.0 out of 5 stars
1 month ago

Decline in quality is real

I've purchased these socks several years ago and really liked them. I've read other recent reviews about the decline in quality but decided to see for myself and unfortunately the socks purchased 9/2026 did not match the same soft feel and overall quality of my previous purchase. I won't be purchasing any more wool socks from REI :(

AJM
Age:65–74
Typical Shoe Size:Mens 9.5
Rated 5.0 out of 5 stars
1 month ago

really nicely cushioned

i swear by merino and quarter lengths... these fit the bill

Age:65–74
Typical Shoe Size:Mens 9.5

Overall Fit Rating

Runs SmallRuns Large
Randy
Location:Ne Wisconsin
Age:65–74
Typical Shoe Size:Mens 11.5
Rated 5.0 out of 5 stars
1 month ago

Comfortable

Nice fit and comfy. I’ll be getting more.

Age:65–74
Typical Shoe Size:Mens 11.5

Overall Fit Rating

Runs SmallRuns Large
Anonymous
Rated 5.0 out of 5 stars
1 month ago

Anonymous
Rated 5.0 out of 5 stars
1 month ago

Anonymous
Rated 4.0 out of 5 stars
1 month ago

Rac
Age:65–74
Typical Shoe Size:Mens 11.5
Rated 4.0 out of 5 stars
2 months ago

Age:65–74
Typical Shoe Size:Mens 11.5

Overall Fit Rating

Runs SmallRuns Large
1 - 10 of 11 Reviews

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