THE SIGNATURE UNDERSHIRT

Stop 100% of Sweat Stains with Numi's Patented Technology

Stay cool, dry, and fresh all day with our innovative sweat-proof undershirts. 

30% OFF

When you buy 3 Undershirts
USE CODE BUNDLE30 AT CHECKOUT

Buy 3,
Save $58

|

Buy 4,
Save $78

|

Buy 5,
Save $97

|

Buy 6,
Save $117

The Signature Undershirt - Numi
The Signature Undershirt
The Signature Undershirt - Numi
The Signature Undershirt - Numi
The Signature Undershirt - Numi
The Signature Undershirt - Numi
The Signature Undershirt
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The Signature Undershirt
The Signature Undershirt
The Signature Undershirt - Numi
The Signature Undershirt
The Signature Undershirt - Numi
The Signature Undershirt - Numi
The Signature Undershirt - Numi
The Signature Undershirt - Numi
The Signature Undershirt
#color_BLACK
The Signature Undershirt
The Signature Undershirt

#1 Best Seller

The Signature Undershirt

Use code: BUNDLE30  for 30% off
when you buy 3 undershirts 

$65.00

$45.5 $65

Elevate Your Outfit: Say Hello to the Better Base Layer

Meet our #1 best seller, The Signature. This OG undershirt is the ultimate base-layer for every outfit. No more sweat-stains or deodorant marks – stay fresh and feel clean all day with this game-changer. With 250,000+ sold worldwide, The Signature Undershirt is the real deal.

*Based on moderate to heavy sweaters

✓ Free Shipping on orders $150+
✓ 30-Day Money Back Guarantee

As Featured In

EMBARRASSING Sweat-Stains & Deo Disasters?

Wave them goodbye

The Signature Undershirt acts as a protective shield, preventing any unwanted stains from reaching your clothes. Our innovative fabric technology wicks away moisture, preserving your favorite outfits and extending their lifespan.

No Sweat Stains? How?

Secret Sweat Proof Shields

Our undershirts have a discreet and ultra-comfortable underarm sweat protection shield. Crafted from Contemporary Cotton™, a unique technical fabric that absorbs sweat and resists odors, our shields employ a one-way moisture transfer system, effectively redirecting moisture and sweat away from the body and keeping your clothing fresh for longer.

Thermo-Regulating.      4-Way Stretch.

Stay ahead of sweat with our advanced technology. Crafted from 90% Thermo-Regulating Tencel™, a supremely soft, breathable, and lightweight fabric that maintains your body temperature, ensuring you stay cool and dry throughout the day. The addition of 10% Lycra® offers optimal 4-way stretch and unmatched comfort for the ultimate layering essential.

Feel your best in any situation

Say goodbye to embarrassing sweat stains and deodorant marks

As women, we understand the unspoken struggles of sweat-stains and deodorant marks, especially in social interactions. The signature undershirt, with its sweat-absorbing technology seamlessly integrated into the fabric, stands as your reliable ally against embarrassing stains and lasting comfort.

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A Resounding Hit

I Love the fit and materials of my Numi classic shirt. It really protects the outerwear sweaters and jackets and other long sleeves from my sweat.. That says a lot.!!

Brooke L.

✓ Verified Purchase

I had a blouse that showed perspiration stains - it was frustrating to use adhesive pads. I am beyond happy with my signature undershirt. It is lightweight, comfy and works to prevent perspiration stains, just as advertised. Best part? Canadian company and made in Canada!

Alison T.

✓ Verified Purchase

Bought this to wear under sweaters and it is perfect! Soft, stretchy and comfy. I’ll be buying more.

Leslie B.

✓ Verified Purchase

The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
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The Semi-Fitted Undershirt
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The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt

The Semi-Fitted Undershirt

$65.00
The Signature Undershirt - Numi
The Signature Undershirt
The Signature Undershirt - Numi
The Signature Undershirt - Numi
The Signature Undershirt - Numi
The Signature Undershirt - Numi
The Signature Undershirt
#color_BLACK
The Signature Undershirt
The Signature Undershirt
The Signature Undershirt - Numi
The Signature Undershirt
The Signature Undershirt - Numi
The Signature Undershirt - Numi
The Signature Undershirt - Numi
The Signature Undershirt - Numi
The Signature Undershirt
#color_BLACK
The Signature Undershirt
The Signature Undershirt

The Signature Undershirt

$65.00
The Square Neck Cap Sleeve Undershirt - Numi
The Square Neck Cap Sleeve Undershirt - Numi
The Square Neck Cap Sleeve Undershirt - Numi
The Square Neck Cap Sleeve Undershirt - Numi
The Square Neck Cap Sleeve Undershirt - Numi
The Square Neck Cap Sleeve Undershirt - Numi
The Square Neck Cap Sleeve Undershirt
The Square Neck Cap Sleeve Undershirt - Numi
The Square Neck Cap Sleeve Undershirt - Numi
The Square Neck Cap Sleeve Undershirt - Numi
The Square Neck Cap Sleeve Undershirt - Numi
The Square Neck Cap Sleeve Undershirt - Numi
The Square Neck Cap Sleeve Undershirt - Numi
The Square Neck Cap Sleeve Undershirt

The Square Neck Cap Sleeve Undershirt

$65.00
The Crop Undershirt - Numi
The Crop Undershirt - Numi
The Crop Undershirt - Numi
The Crop Undershirt - Numi
The Crop Undershirt - Numi
The Crop Undershirt - Numi
The Crop Undershirt
The Crop Undershirt - Numi
The Crop Undershirt - Numi
The Crop Undershirt - Numi
The Crop Undershirt - Numi
The Crop Undershirt - Numi
The Crop Undershirt - Numi
The Crop Undershirt

The Crop Undershirt

$60.00

Looking your best has never been easier

The Signature Undershirt is discreetly designed, ensuring no bulges or seams are visible under your clothing. You can confidently wear any outfit, knowing that your secret weapon is providing the perfect base-layer for a flawless appearance.

No Sweat Stains

Stay dry, confident, and stain-free with our unique cotton underarm shield. No more sweat stains, guaranteed.

Invisible Fit. 4-Way Stretch

Seamless sleeves and the ultra-soft four-way stretch fabric feels soft on the skin and works perfectly for layering

All Day Comfort

A long lasting & breathable fabric keeps you dry & cool all day long, no matter what life throws at you

The Signature Undershirt

Changed the Lives of Thousands of Women

Join the community of women who have experienced the Numi difference, finding a dependable ally against embarrassing stains and lasting comfort.

BUY NOW

Buy 3 Undershirts, Get 30% Off

The Signature Undershirt - Numi
The Signature Undershirt
The Signature Undershirt - Numi
The Signature Undershirt - Numi
The Signature Undershirt - Numi
The Signature Undershirt - Numi
The Signature Undershirt
#color_BLACK
The Signature Undershirt
The Signature Undershirt
The Signature Undershirt - Numi
The Signature Undershirt
The Signature Undershirt - Numi
The Signature Undershirt - Numi
The Signature Undershirt - Numi
The Signature Undershirt - Numi
The Signature Undershirt
#color_BLACK
The Signature Undershirt
The Signature Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt
The Semi-Fitted Undershirt

The Semi-Fitted Undershirt

$65.00
The Signature Undershirt - Numi
The Signature Undershirt
The Signature Undershirt - Numi
The Signature Undershirt - Numi
The Signature Undershirt - Numi
The Signature Undershirt - Numi
The Signature Undershirt
#color_BLACK
The Signature Undershirt
The Signature Undershirt
The Signature Undershirt - Numi
The Signature Undershirt
The Signature Undershirt - Numi
The Signature Undershirt - Numi
The Signature Undershirt - Numi
The Signature Undershirt - Numi
The Signature Undershirt
#color_BLACK
The Signature Undershirt
The Signature Undershirt

The Signature Undershirt

$65.00
The Square Neck Cap Sleeve Undershirt - Numi
The Square Neck Cap Sleeve Undershirt - Numi
The Square Neck Cap Sleeve Undershirt - Numi
The Square Neck Cap Sleeve Undershirt - Numi
The Square Neck Cap Sleeve Undershirt - Numi
The Square Neck Cap Sleeve Undershirt - Numi
The Square Neck Cap Sleeve Undershirt
The Square Neck Cap Sleeve Undershirt - Numi
The Square Neck Cap Sleeve Undershirt - Numi
The Square Neck Cap Sleeve Undershirt - Numi
The Square Neck Cap Sleeve Undershirt - Numi
The Square Neck Cap Sleeve Undershirt - Numi
The Square Neck Cap Sleeve Undershirt - Numi
The Square Neck Cap Sleeve Undershirt

The Square Neck Cap Sleeve Undershirt

$65.00
The Crop Undershirt - Numi
The Crop Undershirt - Numi
The Crop Undershirt - Numi
The Crop Undershirt - Numi
The Crop Undershirt - Numi
The Crop Undershirt - Numi
The Crop Undershirt