REI Co-op Midweight Base Layer Bottoms - Men's
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An ideal performance layer when the mercury drops, the men's REI Co-op Base Layer Bottoms boast a smooth face and low-bulk seams for easy layering and a brushed back for added warmth and comfort.
REI Co-op Midweight Base Layer Tights - Women's
Soft, moisture-wicking 100% merino wool makes the men's REI Co-op merino midweight base layer bottoms an ideal next-to-skin layer for high-performance
![](https://www.rei.com/media/ce3a5d31-b816-49e6-846c-c648f72f2503.jpg?size=576x768)
Merino Midweight Base Layer Bottoms - Men's
![](https://www.rei.com/media/a91bc0a5-e182-4eb8-98a5-fa95aef9d8e5.jpg?size=576x768)
REI Co-op Lightweight Base Layer Bottoms - Men's
![](https://www.rei.com/media/7b728c1c-b188-4e64-80cc-fb7227dc206b.jpg)
Men's Base Layer Bottoms & Thermal Underwear
![](https://www.rei.com/media/fe2f9b6b-4dea-404d-86db-ef5003d4dd37.jpg?size=576x768)
Burton Midweight X Base Layer Bottoms - Men's
The men's REI Co-op lightweight base layer bottoms wick and breathe to keep you comfortable from the first cold steps of morning to sweaty
![](https://www.rei.com/media/5cccd269-a27b-4489-893a-a1d2fe88c3fe.jpg?size=576x768)
Lightweight Base Layer Bottoms - Men's Tall Sizes
REI Co-op Midweight Long-Sleeve Base Layer Top - Men's
![](https://i.ytimg.com/vi/Z26JLwtdiX4/maxresdefault.jpg)
REI Co-op Merino 185 Base Layer Bottoms - Men's
![](https://d1nymbkeomeoqg.cloudfront.net/photos/27/22/393766_15363_XL.jpg)
REI Co-op Midweight Bottoms Review
![](https://www.rei.com/media/de4b0d64-ab6c-4b0b-9834-c8acb2f3185f.jpg)
Men's Midweight Base Layer Bottoms
![](https://i.ytimg.com/vi/OZiE8bufKD4/maxresdefault.jpg)
REI Co-op Midweight Base Layer Half-Zip Top - Women's
![](https://www.rei.com/media/86dd5796-d1c1-4737-b351-f247b1038dde.jpg?size=576x768)
REI Co-op Merino 185 Long-Sleeve Base Layer Top - Men's Tall Sizes
REI Co-op Lightweight Base Layer Half-Zip Top - Men's
![](https://s3.amazonaws.com/images.gearjunkie.com/uploads/2022/01/rei-baselayer-bottom.jpg)
The Best Budget Base Layers: REI Co-op Midweight Base Layer Review