How to Choose Base Layers
REI Co-op Midweight Half-Zip Base Layer Top - Men's
$69.95
Members get an est. $6.99 in rewards
A good day outdoors starts with a good base layer. This soft, synthetic top from REI Co-op provides midweight warmth for comfortable layering on cold days. It has thumbholes and a half-zip front.
Only thru 9/28
Earn 2x card rewards Instead of 5%, earn 10% in card rewards†on REI purchases—even sale items—with your REI Co-op® Mastercard® Sep 18–28. Terms apply. Learn more
- Recycled polyester/spandex is peached for a supersoft next-to-skin layer—and has a smooth face so layers slide on easily
- 220 g/m² fabric weight offers midweight warmth and wicks moisture to keep you comfortable, with spandex adding just the right amount of stretch
- UPF 50+ sun protection
- High neck coverage with a half-zip front lets you open up for venting when you're working hard
- Thumbholes hold sleeves in place and help seal warmth in
- Underarm gussets allow full range of movement
- Semifitted to hug the body for optimum performance
- Flat seams reduce chafing
- Locker loop makes it easy to hang this to dry or just keep it off the ground
- Machine wash cold; wash separately; gentle cycle; remove promptly; do not use bleach or fabric softeners; tumble dry low; low iron; do not dry clean
- 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 a Fair Trade Certified™ factory
- Contains bluepass certified material
Imported.
View all REI Co-op Men's Base Layer Tops| Best Use | Multisport |
|---|---|
| Shirt Type | Partial-zip |
| Fabric | 92% recycled polyester/8% spandex (bluesign® approved) |
| Sun-Protective Fabric | Yes |
| UPF Rating | 50+ |
| Moisture Wicking | Yes |
| Underwear Weight | Midweight |
| Sleeve Length | Long Sleeve |
| Thumbholes | Yes |
| Gender | Men's |
| Sustainability | Fair Trade Certified™ Factory Contains recycled materials Contains materials that meet the bluesign® criteria From a Climate Label Certified brand |
Write a Review
Adding a review will require a valid email for verification
Customer Images
2 weeks ago
Very nice base layer, no complaints
Received free product
This is a really nice base layer. The fabric is soft, comfortable, very stretchy, and seems durable. I have long arms and the sleeves easily cover them down to my hands. The thumb holes are nice for pulling the sleeves through a jacket or something else you're wearing over top. The collar is a good height - it adds to heat retention but isn't too tall or thick to constrain through the neck. The zipper provides plenty of room in the opening for easy on/off. I like the weight of the fabric. The shirt could be layered for very cold temps, or worn by itself for merely chilly weather. I can't really find anything to critique with this shirt. It's well-made, comfortable, looks good, and does its job.
3 weeks ago
Comfy layer for Fall
Received free product
The REi Co-op mid weight half zip is a great piece to wear on a nice fall day that is cool in the morning and mild in the afternoon. Can be paired with a light jacket for cooler days. I really like the light weight stretch but wish it was slightly longer in the torso. I’m a sucker for long sleeves and thumb loops as well. The color is a great share as well. Look forward to cooler weather that should be approaching soon.
1 week ago
Location:Hingham, MA
Age:65–74
Weight:175–200 lbs.
Height:5'10"
1 month ago
No place better for layers than REI
Looking for layers for an upcoming trip and this is perfect
Age:65–74
Weight:175–200 lbs.
Height:5'10"
More expert advice
Need help choosing gear?
This purchase pays for membership!
Buy a lifetime $30 membership and make a $50 purchase by Nov 12, 2026.*
$6
10% Reward*
on this and every eligible full-price item*
+
$30
Bonus Card*
valid for 30 days after joining*
=
$36
Value
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.
