How to Choose Base Layers

Get ready for adventures in the cold with our warmest merino base layer bottoms yet. These REI Co-op heavyweight, high-rise leggings are made with 100% merino wool that's supersoft on the skin.
Imported.
View all REI Co-op Women's Base Layer Bottoms| Best Use | Multisport |
|---|---|
| Fabric | 100% merino wool |
| Sun-Protective Fabric | Yes |
| UPF Rating | 50+ |
| Moisture Wicking | Yes |
| Quick Drying | Yes |
| Underwear Weight | Heavyweight |
| Inseam (in.) | 28 inches |
| Gender | Women's |
| Sustainability | Fair Trade Certified™ Factory From a Climate Label Certified brand |
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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.

