REI Accessibility Statement
Skip to main content
Skip to Shop REI categories

Shop REI
REI Outlet
Trade-In
Travel
Classes & Events
Expert Advice
Uncommon Path
Membership

My REI Find your store
Sign In
Cart

My Account - Sign in or Register
All Camp & Hike
New arrivals

Sale & Clearance

Save 10% on Co-op Camp Bundles
- Expert Advice
- Classes & Events
All Climb
New Arrivals

Sale & Clearance
- Expert Advice
- Classes & Events
All Cycle
New Arrivals

Sale & Clearance

Brand Spotlight: USWE
All Water
New Arrivals

New at REI: Simms

Brand spotlight: BOTE

Sale & Clearance
- Expert Advice
- Classes & Events
All Run
New Arrivals

Just-released running shoes

All Fitness

Workout clothing

Sale & Clearance
- Expert Advice
- Classes & Events
All Snow
New Arrivals

Sale & Clearance

Snow Gear: Packs, Bags & Racks
- Expert Advice
- Shop Services
All Travel
Trips with Intrepid

New Arrivals

Sale & Clearance
- Expert Advice
All Men
- All Men
- Shoes
  - All Shoes
  - Hiking Shoes
  - Running Shoes
  - Boots
  - Casual Shoes
  - Sneakers
  - Sandals
  - Socks
  - Insoles
- Jackets
- Tops
- Bottoms
  - All Bottoms
  - Pants
  - Shorts
- Underwear
- Swimwear
- Accessories
- Headwear
  - All Headwear
  - Hats
  - Sun Hats
  - Bandanas
  - Neck Gaiters
  - Balaclavas
- Activity Collections
- Big, Tall & Short
  - All Big, Tall & Short
  - Big
  - Tall
  - Short
- Men's Deals
New Arrivals

Sale & Clearance
- Expert Advice
All Women
- All Women
- Shoes
  - All Shoes
  - Hiking Shoes
  - Running Shoes
  - Boots
  - Casual Shoes
  - Sneakers
  - Sandals
  - Socks
  - Insoles
- Jackets
- Tops
- Bottoms
  - All Bottoms
  - Pants
  - Leggings
  - Shorts
- Skirts & Dresses
- Underwear
- Swimwear
- Accessories
  - All Accessories
  - Sunglasses
  - Watches
  - Bags
  - Gloves & Mittens
  - Belts
  - Leg Gaiters
- Headwear
  - All Headwear
  - Hats
  - Sun Hats
  - Bandanas
  - Neck Gaiters
  - Balaclavas
- Activity Collections
- Plus, Petite & Tall
- Women's Deals
New Arrivals

Sale & Clearance
- Expert Advice
All Kids
- All Kids
- Footwear
  - All Footwear
  - Boots
  - Shoes
  - Sandals
  - Socks
- Jackets
- Clothing
- Accessories
- Snow
- Kids' Camp & Hike
- Kids' Cycling
- Strollers
- More
- By Gender & Age
- Kids' Deals
New Arrivals

Sale & Clearance
- Expert Advice
All Deals
Shop all deals

REI Outlet deals

Clothing deals

Footwear deals

Camping deals
All Brands
- All Brands
- Made by REI
- Top Brands
  - Arc'teryx
  - KUHL
  - Black Diamond
  - Garmin
  - HOKA
  - La Sportiva
  - Osprey
  - Patagonia
  - Salomon
  - Smartwool
  - The North Face
  - Thule
- Trending Brands
  - prAna
  - Brooks
  - Cotopaxi
  - Danner
  - Dometic
  - Electra
  - Janji
  - On
  - Snow Peak
  - YETI
  - Thousand
  - Vuori
- Member Favorites
  - Big Agnes
  - Cannondale
  - Darn Tough
  - Fjallraven
  - Exped
  - Gregory
  - Keen
  - Merrell
  - NEMO
  - Oboz
  - Sea to Summit
  - Yakima
Patagonia Deals

The North Face Deals

Deals by Brand

Contact Us

Need some help?

Find answers online any time

message 1 of 4.

Save up to 70% on selected REI Outlet items thru 8/3.

message 2 of 4.

Up to 50% off past-season styles from your favorite brands.

message 3 of 4.

Become an REI Co-op Member thru 9/7 and earn a $30 single-use promo card—plus a lifetime of benefits. Terms apply.

message 4 of 4.

Members, earn 15% in Total REI Rewards on eligible full-price purchases with the REI Co-op Mastercard. Terms apply.

message 1 of 3.

Save up to 70% on selected REI Outlet items thru 8/3.

message 2 of 3.

Up to 50% off past-season styles from your favorite brands.

message 3 of 3.

Members, earn 15% in Total REI Rewards on eligible full-price purchases with the REI Co-op Mastercard. Terms apply.

Skip to search results

loaded 20 results

Men's Clothing
Men's Shirts
Men's Active Shirts
Men's Running Shirts

Merino Wool Men's Running Shirts

(20 products)

Products (20)

Filter

Store Pickup
Ready within 2 hours
Select a store
ZIP or City, State
Example: 98102 or Taos, NM
Ship to Address (14)
- 2XL
- XS
- Small
- Medium
- Large
- XL
- Deals
- T-shirt
- Partial-zip
- Black
- Blue
- Gray
- Green
- Khaki
- Orange
- Red
- Men's
- Regular
- Big
- Polyester / Polyester Blend
- Wool / Wool Blend
- Hoodless
- Hooded
- 0 to 0.49
- 0.5 to 0.99
- Hip-length
- Solid
- Colorblock
- Intraknit
- Merino Sport

Remove features filter:Merino Wool

Sort: Best Match

View:

Top Rated
SmartwoolActive Mesh Hoodie - Men's
$110.00
20 reviews with an average rating of 4.8 out of 5 stars
Add Active Mesh Hoodie - Men's to Compare
SmartwoolActive T-Shirt - Men's
$75.00
3 reviews with an average rating of 5.0 out of 5 stars
Add Active T-Shirt - Men's to Compare
Top Rated
SmartwoolActive Mesh T-Shirt - Men's
$85.00
5 reviews with an average rating of 4.8 out of 5 stars
Add Active Mesh T-Shirt - Men's to Compare
BrooksHigh Point Shirt - Men's
$42.73
Save 28%
compared to $60.00
23 reviews with an average rating of 3.7 out of 5 stars
Add High Point Shirt - Men's to Compare
REI OUTLET
Top Rated
IcebreakerMerino 125 Cool-Lite Speed T-Shirt - Men's
$69.93 - $100.00
8 reviews with an average rating of 4.6 out of 5 stars
Add Merino 125 Cool-Lite Speed T-Shirt - Men's to Compare
SmartwoolActive Ultralite Long-Sleeve T-Shirt - Men's
$59.73
Save 25%
compared to $80.00
15 reviews with an average rating of 3.5 out of 5 stars
Add Active Ultralite Long-Sleeve T-Shirt - Men's to Compare
REI OUTLET
SmartwoolActive Quarter-Zip Top - Men's
$120.00 - $130.00
6 reviews with an average rating of 4.0 out of 5 stars
Add Active Quarter-Zip Top - Men's to Compare
Top Rated
IcebreakerMerino 125 Cool-Lite Speed Tank Top - Men's
$90.00
5 reviews with an average rating of 5.0 out of 5 stars
Add Merino 125 Cool-Lite Speed Tank Top - Men's to Compare
IcebreakerMerino 260 Quantum Long-Sleeve Zip Jacket - Men's
$220.00
5 reviews with an average rating of 3.0 out of 5 stars
Add Merino 260 Quantum Long-Sleeve Zip Jacket - Men's to Compare
New arrival
JanjiRepeat Merino Long-Sleeve Shirt - Men's
$98.00
0 reviews
Add Repeat Merino Long-Sleeve Shirt - Men's to Compare
New arrival
SmartwoolIntraknit Seamless Long-Sleeve - Men's
$130.00
0 reviews
Add Intraknit Seamless Long-Sleeve - Men's to Compare
IcebreakerMerino Blend 200 RealFleece Descender Long-Sleeve Half-Zip Jacket - Men's
$160.00
7 reviews with an average rating of 4.4 out of 5 stars
Add Merino Blend 200 RealFleece Descender Long-Sleeve Half-Zip Jacket - Men's to Compare
Sale Ends Aug 3
SmartwoolIntraknit Active T-Shirt - Men's
$29.73
Save 68%
compared to $95.00
9 reviews with an average rating of 2.4 out of 5 stars
Add Intraknit Active T-Shirt - Men's to Compare
REI OUTLET
Top Rated
JanjiRover Merino Hoodie - Men's
$136.00
14 reviews with an average rating of 4.5 out of 5 stars
Add Rover Merino Hoodie - Men's to Compare
Sale Ends Aug 3
BrooksHigh Point Long-Sleeve Shirt - Men's
$34.73
Save 47%
compared to $66.00
23 reviews with an average rating of 3.7 out of 5 stars
Add High Point Long-Sleeve Shirt - Men's to Compare
REI OUTLET
SmartwoolActive Mesh T-Shirt - Men's
$53.73
Save 28%
compared to $75.00
1 reviews with an average rating of 5.0 out of 5 stars
Add Active Mesh T-Shirt - Men's to Compare
REI OUTLET
New arrival
IcebreakerMerino 400 RealFleece Grid Blackridge Pullover Hoodie - Men's
$270.00
0 reviews
Add Merino 400 RealFleece Grid Blackridge Pullover Hoodie - Men's to Compare
New arrival
SmartwoolActive Fleece Wind Hoodie - Men's
$195.00
0 reviews
Add Active Fleece Wind Hoodie - Men's to Compare
New arrival
SmartwoolActive Fleece Wind Half Zip - Men's
$185.00
0 reviews
Add Active Fleece Wind Half Zip - Men's to Compare
RoarkMillcreek Merino Long-Sleeve Shirt - Men's
$25.83
Save 70%
compared to $89.00
3 reviews with an average rating of 2.7 out of 5 stars
Add Millcreek Merino Long-Sleeve Shirt - Men's to Compare

Sort: Best Match

Related Expert Advice articles

Running is more comfortable with the right clothing. This article highlights fabrics and features for warm weather and winter running.

Read full article: What to Wear Running

Thinking about running a marathon? This article will help you get started with tips on training, hydrating, fueling and more.

Read full article: How to Train for a Marathon

Learn how to select and prepare for your first trail ultramarathon, with tips on nutrition, hydration, mental and physical prep and more.

Read full article: Tips for Your First Ultramarathon Trail Race

Planning to run 26.2 miles in over five hours? Here are some training and racing tips to set you up for a positive marathon experience.

Read full article: How to Train for a Marathon Completed in Over 5 Hours

Related searches

Men's Hiking Shirts: Deals
Patagonia Men's Hiking Shirts
Men's Rashguards
Men's Hiking Shirts
Long Sleeve Men's Rashguards
Long Sleeve Men's Hiking Shirts
Men's Travel Shirts

Checkout faster

Track your order, shop and save— all in one place

Get the REI app

How are we doing?

on this page.

Sign up for REI emails

Get 15% off one REI Co-op brand item. Details

Email

Error Is your email address correct?

REI Privacy Notice

Thank you for signing up!

Check your inbox for your welcome email. It includes your 15%-off coupon and ways to set preferences.

System Maintenance

The newsletter sign-up system is currently down for maintenance.

Who we are

At REI, we believe that a life outdoors is a life well lived. We've been sharing our passion for the outdoors since 1938.

Become an REI Co-op Member

Anyone can join and everyone belongs. Benefits include great gear offers, special pricing on events and an annual Co-op Member Reward—for life. Join once, enjoy forever.

Take a stand

Outdoor equity, climate action, places we love. Raise your voice in the movement to protect and share life outdoors.

REI Cooperative Action Network

Apply for the REI Co-op® Mastercard®

Earn a $100 REI gift card after your first purchase outside of REI within 60 days from account opening.

Details | Manage your card

REI Co-op Account
Orders & Returns
Gifts
- Outdoor Gift Ideas
- Gift Cards
Offers & Discounts
- Sales & Coupons
- Free Shipping Details
Shopping Tools
Learning & Community
Work with Us
REI Co-op
Customer Service

Find answers online anytime.

See our stores and services.

Mon–Fri, 6am–8pm PT

Sat–Sun, 8am–5pm PT

Get REI apps for shopping & adventure

instagram
Tik Tok
facebook
pinterest
youtube
podcasts

© 2026 Recreational Equipment, Inc. All rights reserved. REI and the REI Co-op logo are trademarks of Recreational Equipment, Inc.

Terms of Use
Privacy Notice
US State Privacy Notice
Consumer Health Data Privacy Policy
Product Recalls
CA Transparency Act
Membership Terms
REI Accessibility Statement