How to Choose Hiking Socks
REI Co-op Silk Liner Crew Socks
$17.95
Wear the REI Co-op Silk liner crew socks under your hiking socks to protect your feet from blisters. Or wear them alone because they're strong, cool and moisture-absorbent for comfort on hot trails.
- Made from a blend of spun silk, nylon and Lycra® spandex for durability and stretch
- Machine wash inside out in cold or warm water, no bleach or fabric softener; tumble dry low; do not iron or dry clean
- 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| Best Use | Hiking |
|---|---|
| Fabric | 51% silk/47% nylon/2% Lycra® spandex |
| Sock Height | Crew |
| Sock Cushioning | No Cushioning |
| Moisture Wicking | Yes |
| Gender | Unisex |
| Sustainability | From a Climate Label Certified brand |
REI Co-op Socks - Unisex Adult
| S | M | L | XL | S/M | L/XL | |
|---|---|---|---|---|---|---|
| U.S. Men's | 5.5-8.5 | 9-12 | 12.5-14 | 5.5-8.5 | 9-14 | |
| U.S. Women's | 4-6.5 | 7-9.5 | 10-12.5 | 4-9.5 | 10-12.5 |
Sizing Notes
For socks, please use shoe size.
Buying Advice
Better gear is built together
From feedback to field testing, all of our gear is dialed-in by REI Co-op members. Their adventures informed every stitch and detail—making for better, longer-lasting gear.
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Most Helpful Favorable Review
Blister free on Kilimanjaro
BoiseMama3 years ago
I had never used liner socks before but the company guiding our trip up Mt. Kilimanjaro recommended wearing them so I bought 4 pairs of these silk liner socks. I wore them every day, in the warm weather at lower elevations to the very cold weather at the summit. Using these and SmartWool hiking socks my feet stayed blister free for the entire 8-day, 73 km trek. I could feel the sock layers gliding past each other, which meant the shear forces weren't being transferred directly to my skin (I'm a podiatrist by the way!). These kept my feet warm, dry and comfortable, and they were thin enough to easily fit under hiking socks and in my boots. I highly recommend!
BoiseMama
Boise, ID
64 people found this review helpful
Most Helpful Critical Review
Not the same sock as before
Wildifreq4 years ago
I had a pile of these socks from years ago that were finally beginning to wear thin/holes in the heels from my wildland fire boots, so since I loved them so much I came here to buy more. When I got them I washed them and tossed them in my gear, not thinking anything of it because why would I need to try on the new socks??
Well, fast forward to fire season, and the very first day on the line I noticed right away there was something wrong. The socks did not feel right. The tops of my toes were scratchy and itchy. The socks were tight and didn't fit well. I got a blister on top of my toes from the "REI CO-OP" stitching. The old socks had a printed logo on the side of the calf portion of the sock. Who thought adding STITCHED lettering on top of the TOES would be a good idea? And they obviously aren't made from the same materials as the old socks. I ended up with completely tore up feet and actually had to stay off the line one day to let some of the blisters dry out and heal. NOT something you want to have happen when you're busting butt on the fire line during a busy fire season. My feet are literally my lifeline out there, and I am beyond disappointed in these socks. But, because I rely on liner socks with my merino wool socks to make my boots fit well, I had to wear them. I ended up wearing them inside out to lessen the rubbing from the stitching, which actually helped a lot once I finally thought of it.
I even went into denial about it, thinking perhaps it was because my boots were old. So, now I have new fire boots, and guess what? The socks still feel awful on my feet. Still getting weird rubbing on my toes. Still just doesn't feel "right."
Wildifreq
Franklin, IN
70 people found this review helpful
Customer Images
BoiseMama
Boise, ID
Blister free on Kilimanjaro
3 years ago
I had never used liner socks before but the company guiding our trip up Mt. Kilimanjaro recommended wearing them so I bought 4 pairs of these silk liner socks. I wore them every day, in the warm weather at lower elevations to the very cold weather at the summit. Using these and SmartWool hiking socks my feet stayed blister free for the entire 8-day, 73 km trek. I could feel the sock layers gliding past each other, which meant the shear forces weren't being transferred directly to my skin (I'm a podiatrist by the way!). These kept my feet warm, dry and comfortable, and they were thin enough to easily fit under hiking socks and in my boots. I highly recommend!
Age:35–44
Typical Shoe Size:Womens 6
Yes , I recommend this product
Marcy MM
Washington DC
Disappointed in quality
4 years ago
I have other silk liner socks that have lasted over 20 years. These are starting to wear after only about 40 miles. The heel is noticeably thinner already and they are pilling at the heel and ankle. The fit and function is great. I agree that white is not the best color. But these are wearing out TOO fast. I machine wash in cold water and hang to dry.
Age:55–64
Typical Shoe Size:Womens 7.5
No, I do not recommend this product
Kristen
Not as Durable as nylon, but better Performance
4 years ago
Not as durable as other materials, but these liners are the thinnest and least noticeable compared to nylon liners. I’m an Arizona hiker, and these liners are great for the 100+ temperatures. Yeah, of course you’re gonna get sweaty in those temperatures. But my personal experience is that these HELP your feet from feeling so sweltering hot and wet.
Yes , I recommend this product
8PAWSK9
Huntsville, Alabama
Great “primary” sock
2 years ago
I purchased to wear as a “primary” sock vs using as a liner for a pair of shoes which were a little too tight fit for regular cotton or wool socks. These were a perfect solution- added bonus of no foot sweating in hot temperature. I am a female with a 7.5 shoe size and purchased “M” in this product. These work so well as a “primary” sock I plan to purchase several more pair.
Age:55–64
Typical Shoe Size:Womens 7.5
No, I do not recommend this product
Jeanne
Vermont
Nice fit and very comfortable
2 years ago
Bought these as extra insulation in winter for my easily chilled feet. With the added stretchiness, these fit very comfortably --- though the mediums are maxed out at my size 8 feet. If you are an 8 1/2 or 9, or have bunions, order the Large size. Wore them for a day and feet were warm and dry. Getting a pair for a birthday present for friend.
Age:65–74
Typical Shoe Size:Womens 8
Yes , I recommend this product
Wildifreq
Franklin, IN
Not the same sock as before
4 years ago
I had a pile of these socks from years ago that were finally beginning to wear thin/holes in the heels from my wildland fire boots, so since I loved them so much I came here to buy more. When I got them I washed them and tossed them in my gear, not thinking anything of it because why would I need to try on the new socks?? Well, fast forward to fire season, and the very first day on the line I noticed right away there was something wrong. The socks did not feel right. The tops of my toes were scratchy and itchy. The socks were tight and didn't fit well. I got a blister on top of my toes from the "REI CO-OP" stitching. The old socks had a printed logo on the side of the calf portion of the sock. Who thought adding STITCHED lettering on top of the TOES would be a good idea? And they obviously aren't made from the same materials as the old socks. I ended up with completely tore up feet and actually had to stay off the line one day to let some of the blisters dry out and heal. NOT something you want to have happen when you're busting butt on the fire line during a busy fire season. My feet are literally my lifeline out there, and I am beyond disappointed in these socks. But, because I rely on liner socks with my merino wool socks to make my boots fit well, I had to wear them. I ended up wearing them inside out to lessen the rubbing from the stitching, which actually helped a lot once I finally thought of it. I even went into denial about it, thinking perhaps it was because my boots were old. So, now I have new fire boots, and guess what? The socks still feel awful on my feet. Still getting weird rubbing on my toes. Still just doesn't feel "right."
Age:35–44
Typical Shoe Size:Womens 10
No, I do not recommend this product
Colorado Hiker and Climbr
Colorado
Why White
2 years ago
These were great for preventing blisters, but I don’t get why they are white? After one backpacking trip mine are now stained brown and look old and nasty.
Age:25–34
Typical Shoe Size:Mens 9.5
ajosacto
Received free product
Alabama
Comparable to other silk liners
5 years ago
I use liner socks under my wool socks when hiking year-round to reduce blisters. The socks performed similar to silk liners I have bought from other brands like Injinji. I also wore them without any other socks on a two hour walk and felt that they kept my feet cool and dry. I would say these socks run a little snug, but that makes sense given their function.
Yes , I recommend this product
Becky
Great for backpacking
3 years ago
I wear these under a mid-weight wool sock for blister-free backpacking. They hug my feet, so nothing is rubbing my skin. These last for years, but these are replacing a pair that finally gave out. Fit snug, but true to size.
Age:55–64
Typical Shoe Size:Womens 8
Yes , I recommend this product
Matt
Chicago, IL
Don't overdry!
2 years ago
I learned the hard way that silk shrinks in the dryer. They still fit, but barely. I don't recall having this issue previously but maybe I didn't really have a silk product.
Age:55–64
Typical Shoe Size:Mens 11.5
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