How to Choose Base Layers

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Whether you're skiing, hiking or running, these Smartwool 3/4-length base layer bottoms provide reliable comfort and breathability. They're made of warm merino wool. And they have a traditional fly.
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View the Smartwool Classic Thermal Merino Product LineView all Smartwool Men's Base Layer Bottoms| Best Use | Multisport |
|---|---|
| Fabric | Merino wool |
| Moisture Wicking | Yes |
| Fly Opening | Yes |
| Underwear Weight | Midweight |
| Inseam (in.) | 21.5 inches |
| Gender | Men's |
| Sustainability | Contains ZQ merino wool |
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