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Shop All Sweat-Proof Undershirts
15% OFF SITEWIDE
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#color_almond #color_almond
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The Signature Undershirt $65.00
4.68 reviews
15% OFF SITEWIDE
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The Crop Undershirt $65.00
4.7 reviews
15% OFF SITEWIDE
#color_black #color_black
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The Merino Wool Short-Sleeve Crewneck Undershirt $85.00
5.0 reviews
15% OFF SITEWIDE
#color_black #color_almond
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The Lace Undershirt $65.00
4.76 reviews
15% OFF SITEWIDE
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#color_almond #color_white
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The Square Neck Cap Sleeve Undershirt $65.00
4.37 reviews
15% OFF SITEWIDE
#color_almond #color_truffle
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The Semi-Fitted Undershirt $65.00
4.74 reviews
15% OFF SITEWIDE
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#color_black #color_black
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The Merino Wool Signature Undershirt $85.00
4.7 reviews
15% OFF SITEWIDE
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#color_grey #color_white
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The Short-Sleeve Crewneck Undershirt $65.00
4.8 reviews
15% OFF SITEWIDE
New Arrivals
#color_black #color_black
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The Short Sleeve Lace Overlay $75.00
5.0 reviews
15% OFF SITEWIDE
#color_almond #color_white
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The Three Quarter Undershirt $65.00
4.72 reviews
15% OFF SITEWIDE
#color_black #color_black
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The Merino Wool Long-Sleeve Crewneck Undershirt $100.00
4.64 reviews
15% OFF SITEWIDE
#color_black #color_black
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The Merino Wool Turtleneck Undershirt $120.00
4.93 reviews

fresh all day

Sweat-Proof Undershirts

Keep your clothes clean and fresh with our sweat-proof undershirts. Built-in underarm shields provide unmatched moisture-wicking and sweat protection, ensuring you stay comfortable and your outerwear stays spotless throughout the day.

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embrace the natural

Merino Wool

Naturally thermoregulating, odor-resistant, and perfect for layering, it’s the ultimate base layer for the chilly months ahead.

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Finally, an undershirt that covers my bra and doesn't squeeze the breath out of me. The semi-fitted undershirt is a great fit for me, and it doesn't show under fitted sweaters!

Valerie Sinclair

Once you’ve tried these undershirts, you can’t live without them. They regulate your temperature, wick your sweat, hide your bra under transparent blouses, and reduce the need for washing and ironing your shirts and blouses!! I love everything about them and similar brands just don’t match this quality.

Grace Morrish

I love this shirt. It even works nicely as a main shirt under a cardigan sweater or jacket. It’s thin enough that it doesn’t show under blouses, dresses, or other clothing I want to protect. I love it.

Heather Cogdell
#color_truffle The Semi-Fitted Undershirt
#color_almond The Signature Undershirt
#color_almond The Lace Undershirt

FAQs

Frequently Asked Questions

What makes Numi’s sweat-proof undershirts different from regular undershirts?

Our sweat-proof undershirts feature built-in underarm shields that wick away moisture and prevent sweat from reaching your outerwear. This keeps your clothes clean and fresh all day.
Are the sweat-proof undershirts comfortable to wear all day?

Yes, our undershirts are designed with comfort in mind. They’re made from a soft, stretchy fabric that feels great against your skin and moves with you throughout the day.

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