How to Choose Hiking Socks
REI Co-op Flash Merino Wool Lightweight Crew Socks
$19.95
The REI Co-op Flash Merino Wool Lightweight crew socks are our most popular summer-weight hiking socks for good reason—they're naturally breathable, sweat wicking, quick drying and odor resistant.
- Targeted cushioning at heels and balls of feet without too much bulk
- Reinforcement at heels, toes, footbeds and Achilles provides long-wearing comfort
- Supportive elastic at arches for extra support
- Seamless toes prevent chafing
- Machine wash inside out 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 the REI Co-op Flash Product LineView all REI Co-op Men's Hiking Socks| Best Use | Hiking |
|---|---|
| Fabric | 45% merino wool/44% nylon/8% polyester/3% LYCRA spandex |
| Sock Height | Crew |
| Sock Cushioning | Light Cushioning |
| Quick Drying | Yes |
| 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.
Review this Product
Adding a review will require a valid email for verification
wutang
Charlotte
Am I really writing a review of socks?
2 years ago
Yes I am. I hate to spread the word but these are perfect. Not too thin, not too thick. Great odor control. I've worn them 2-3 days in a row without them smelling. Def a 3-season sock, prob too hot for peak summer wear. $20 for a pair of socks though? Yes. Just do it. I like them better than SmartWool.
Age:35–44
Typical Shoe Size:Mens 10
Yes , I recommend this product
Mollie
Favorite socks
2 years ago
I bought these in 3 colors. Just the right thickness. They wash well. Over the years I've bought socks from REI and I love them. After 4 years of wear I'm replacing with new pairs. They are true to size. I highly recommend.
Jeff243
San Diego, CA
Excellent for Hiking Bear Country in BC Canada
2 years ago
Wore these hiking Whistler, BC. Picked them up in San Diego, thinking they’d be nice to try. Oh my gosh, what amazing socks… REI puts out a great sock for the money. Wore them first day and I was in love. They’re durable and very comfortable. Especially for the price compared to so many others i seas, some nearly $40 for a pair of socks. Can’t say enough about these. Don’t believe me? Buy and try to see for yourself. You’re welcome! 🙂
Age:55–64
Typical Shoe Size:Mens 11
Yes , I recommend this product
Peter Soliz
Tucson, AZ
Comfortable and affordable.
1 year ago
I like these as much as I do my Darn Tough socks. If you know me you'll understand what a compliment I'm paying this product. I'm going to be getting a few more pairs to really try out.
Age:35–44
Typical Shoe Size:Mens 11
Yes , I recommend this product
Brian
Just Right.
1 year ago
Perfect for a short hike, a long walk, or just running errands around town all day. So well fitting and comfortable, you don't even notice them, which is what you want (if you're aware of them, it's because something doesn't feel right). The fun color and pattern is a nice bonus.
Yes , I recommend this product
ValS
Oklahoma City
REI -Really Great Products
1 year ago
REI Sox are really great! Great value, great fit, really great product!
Age:75 or over
Typical Shoe Size:Mens 11
John
NC
A very comfortable sock
1 year ago
I went for a hike wearing these socks. Wow…better than my Smarts wools and Darn Tough by far! Thank you for designing such a great sock!
Typical Shoe Size:Mens 10
Babs
Great buy
2 years ago
Great socks, hold up well, feet don’t stink as with regular socks from sweat. Comfy and not itchy at all.
Age:45–54
Typical Shoe Size:Womens 10
Yes , I recommend this product
Ricky
Colorado
Good hiking socks
1 year ago
Super comfy and warm. My new favorite hiking sock.
Age:45–54
Typical Shoe Size:Mens 12
Yes , I recommend this product
BobR
WI
Great socks!
5 months ago
Nice cushion and very comfortable for cool and cold weather hiking. No seams or bunching at the toes and no signs of wear or fraying. I liked the first pair so much I bought a second pair. The color pattern goes great with jeans and other color pants. I only wish they were a bit taller but not a huge deal. These are more comfortable for hiking than my Darn Tough socks.
Age:65–74
Typical Shoe Size:Mens 10
Yes , I recommend this product
1 - 10 of 58 Reviews