How to Choose Base Layers
REI Co-op Merino 250 Long-Sleeve Crew Base Layer Top - Women's
$104.95
Members get an est. $10.49 in rewards
Get ready for adventures in the cold with our warmest merino wool base layer yet. This supersoft REI Co-op heavyweight base layer top is made with 100% merino wool. It wicks sweat and dries fast.
- Heavyweight 250 g/m² merino wool offers a soft feel without the scratchiness
- Made with 100% merino wool that naturally wicks away sweat, resists odors and dries quickly
- UPF 50+ sun protection
- Underarm gussets are made for ease of movement
- Shoulder seams are rolled forward to help prevent chafing under pack straps
- Close-to-body fit for optimum performance
- Shirttail hem
- Weight for size S: 7.9 oz. (223 g)
- Locker loop makes it easy to hang this shirt to dry or just keep it off the ground
- Machine wash cold, use wool wash product, do not twist or wring, remove promptly; do not bleach; tumble dry low
- 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
Imported.
View all REI Co-op Women's Base Layer Tops| Best Use | Multisport |
|---|---|
| Shirt Type | T-shirt |
| Fabric | 100% merino wool |
| Sun-Protective Fabric | Yes |
| UPF Rating | 50+ |
| Moisture Wicking | Yes |
| Quick Drying | Yes |
| Underwear Weight | Heavyweight |
| Sleeve Length | Long Sleeve |
| Gender | Women'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!
Buy a lifetime $30 membership and make a $50 purchase by Sep 07, 2026.*
$10
10% Reward*
on this and every eligible full-price item*
+
$30
Bonus Card*
valid for 30 days after joining*
=
$40
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.
