REI Co-op Silk Long Underwear Crew Shirt Review - Man Makes Fire

The REI Co-op Silk Long Underwear Crew Shirt is an ultra lightweight base layer that is best used for people who want no-bulk base layers. Surprisingly warm.
The REI Co-op Silk Long Underwear Crew Shirt is an ultralight base layer made entirely of natural silk.

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Silk is lightweight and one of nature’s best insulators. So this crew is great for layering under sweaters, shirts, flannels, you name it. It also

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