Sweat-Proof Undershirts for Women | Comfortable & Invisible – Numi

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The Undershirt for Your Wardrobe

A slim, lightweight layer between you and your favorite pieces so you can feel confident and keep them at their best.

★★★★★4.8 avg. | Trusted by 150,000+

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Every Numi undershirt protects the pieces you care about. Build your collection to suit any neckline, sleeve length, outfit, or weather.

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\ \ Shop Modal \ \ Thermo-regulating modal for lightweight, breathable softness. Perfect for everyday wear. Available in multiple styles.\ \ Shop this →](/content/collections/modal-undershirts/index.html) \ \ Shop Mesh \ \ Whisper Weight Mesh—an ultra-light, barely-there fabric that’s sheer and effortlessly feminine. Available in multiple styles.\ \ Shop this →](/content/collections/mesh-undershirts/index.html) \ \ Shop The Crop \ \ All the benefits without the extra fabric. Designed for those who prefer high-waisted bottoms, cropped tops, or just fewer layers. Available in mesh and modal.\ \ Shop this →](/content/products/numi-sweat-proof-undershirt-for-women-the-crop/index.html)

Shop by Solution

Your wardrobe, upgraded. One problem-solving piece at a time.

Stop Sweat Stains →

Skip the Dry Cleaner →

Save Your Clothes →

Travel Light →

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How the Shield Works

Numi's built-in underarm protection, thoughtfully integrated into every undershirt. Its technical cotton layer helps absorb perspiration and deodorant before they reach your outer clothing, helping keep your favorite tops looking fresher for longer.

Premium Materials

The shield is made from ultra-soft cotton for exceptional comfort and breathability. Undershirts are available in multiple fits, necklines, sleeve lengths, and materials.

Engineered Moisture Control

The shield is engineered to draw perspiration away from your skin and into its absorbent core, helping keep moisture away from your clothing.

No Plastic Layer

Unlike disposable underarm pads, the shield contains no plastic layer, just breathable cotton designed for everyday comfort.

Built for Comfort

The shield is permanently sewn into every Numi undershirt, so it won't shift, bunch or move out of place.

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Worn in Real Life

★★★★★4.8 out of 5 · 2,847 Reviews

Written Reviews

★★★★★ ★★★★★ 5

I stopped taking my cashmere to the cleaner. That's it. That's the review.

Priya D.Brooklyn · 3 pieces

★★★★★ ★★★★★ 5

I wore The Signature under a silk blouse in a July board meeting and there was nothing to see.

Michelle L.New York · 4 pieces

★★★★★ ★★★★★ 5

Snug without feeling tight. I forget I have it on until I take my blazer off and everything is still dry.

Rachel P.Vancouver · 2 pieces

★★★★★ ★★★★★ 5

I bought one to test it and three more the next week. My good knits go twice as long between cleans now.

Dana K.Chicago · 4 pieces

★★★★★ ★★★★★ 5

The sleeve edge is the part nobody talks about. No elastic digging in, nothing showing through a fitted shirt.

Aisha M.Toronto · 2 pieces

★★★★★ ★★★★★ 4

I travel constantly and this is the one thing that goes in every bag. Washes cold, dries overnight.

Elena R.Austin · 5 pieces

←→

our best-selling solution

Essential Undershirts

With

400,000+

sold

worldwide,

this

the

ultimate

base-layer

for

every

outfit.

Our

technical

shield

means

sweat-stains

deodorant

marks.

you

stay

fresh

and

confident

all

day.

[Shop Now](/content/collections/modal-undershirts "Shop Now"/index.html)

Numi is on a mission to ensure every woman feels as good as she looks in her clothes.

So we made the world’s first undershirt just for women. Sweat-proof, ultra-comfortable, and confidence-boosting by design.

Learn More

Easy Returns

[Easy returns & exchanges on U.S. & Canada orders](/content/pages/returns-exchanges "Returns and Exchanges"/index.html)

Chat with us

[Email us](/content/pages/contact-us "Contact Us"/index.html) and we'll get back to you soon.

30-Day Money Back Guarantee

[Love it or return it. No questions.](/content/pages/returns-exchanges "https://wearnumi.com/pages/returns-exchanges"/index.html)

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