How to Choose Base Layers
REI Co-op Merino 250 Base Layer Bottoms - Men's
$104.95
Members get an est. $10.49 in rewards
Get ready for adventures in the cold with our warmest merino base layer bottoms yet. These heavyweight REI Co-op base layer bottoms are made with 100% merino wool that wicks sweat and dries fast.
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
- 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
- Soft jacquard waistband is comfortable on the skin—and its low profile allows for easy layering
- Crotch gusset is made for ease of movement
- Functional fly
- Close-to-body fit for optimum performance
- Locker loop makes it easy to hang these to dry or just keep them off the ground
- Inseam length: 29 in.; Tall sizes: 32 in.
- Weight for size M: 8.8 oz. (250 g)
- 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 Men's Base Layer Bottoms| Best Use | Multisport |
|---|---|
| Fabric | 100% merino wool |
| Sun-Protective Fabric | Yes |
| UPF Rating | 50+ |
| Moisture Wicking | Yes |
| Quick Drying | Yes |
| Fly Opening | Yes |
| Underwear Weight | Heavyweight |
| Inseam (in.) | 29, 32 inches |
| Gender | Men's |
| Sustainability | Fair Trade Certified™ Factory From a Climate Label Certified brand |
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