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Layer Smartwool’s Microweight Singlet under your shell before you head into the mountains. Merino wool fabric pulls moisture from your skin when you heat up, breathes easily, and resists odor, and the flatlock seam construction eliminates chafing when you’re on the move.

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SmartWool NTS Microweight Singlet - Men's

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Here's what others have to say...

5 5

Come back merino wool undershirt!

  • Familiarity: I've put it through the wringer
  • Fit: True to size

I think I purchased the last two of these on the internet, please bring them back SmartWool! My cotton undershirts are just a disappointment to me now, but I don't have enough to last a whole week.