How to Choose Base Layers
REI Co-op Merino 185 Half-Zip Base Layer Top - Men's
$89.95
Outfit yourself for adventure with this 100% merino wool base layer top from REI Co-op. The breathable, ultrafine wool naturally resists odors and pilling. Flat seams are comfortable on the skin.
- Ultrafine 185 g/m² merino wool offers a soft feel without any itchiness
- Made with 100% merino wool that naturally breathes, wicks sweat, dries quickly, and resists odors and pilling
- UPF 30 sun protection
- Half-zip front helps with venting; standing collar and chin guard for protection
- Flat seams and merrow stitch construction reduce chafing
- Underarm gussets allow full range of movement
- Semifitted to hug the body for optimum performance
- Locker loop makes it easy to hang this to dry or just keep it off the ground
- Machine wash warm, gentle cycle; use wool wash product; do not twist or wring; remove promptly; do not bleach; tumble dry low; cool iron; dry cleaning not recommended
- Made of wool sourced according to third-party animal welfare standards adopted by REI Co-op brand
- Made in a Fair Trade Certified™ factory
- 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
Imported.
View the REI Co-op Merino 185 Product LineView all REI Co-op Men's Base Layer Tops| Best Use | Multisport |
|---|---|
| Shirt Type | Partial-zip |
| Fabric | 100% merino wool |
| Sun-Protective Fabric | Yes |
| UPF Rating | 30 |
| Moisture Wicking | Yes |
| Quick Drying | Yes |
| Underwear Weight | Lightweight |
| Sleeve Length | Long Sleeve |
| Gender | Men's |
| Sustainability | Fair Trade Certified™ Factory From a Climate Label Certified brand |
Be the first to write a review!
Adding a review will require a valid email for verification
More expert advice
This purchase pays for membership!
$8
10% Reward
on this and every eligible full-price item*
+
$30
Bonus Card
valid for 30 days after joining*
=
$38
Value
Buy a lifetime $30 membership and make a $50 purchase by Sep 07, 2026.*
Keep shopping
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.
