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Use Code: SWEAT20 at Checkout

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★★★★★ Over 10,000+ 5 Star Reviews

Say Goodbye to Embarrassing Sweat Stains and Deodorant Marks.
Stay Dry and Comfortable All Day.

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
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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

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.

1343 reviews

#1 Best Seller

$65.00
$65.00

Get 20% OFF with code SWEAT20

SALE ENDS IN

Meet our #1 best seller, The Signature Undershirt. 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. 

Color

30 Day Money Back Guarantee

On U.S. & Canada orders

Easy Returns

On U.S. & Canada orders

Free Shipping

On orders over $150

Secure Checkout

On all orders

As Featured In

Get ready to feel exceptional comfort and unstoppable confidence with Numi undershirts. Engineered with our exclusive Contemporary Cotton™ sweat-proof shield technology, say goodbye to embarrassing sweat stains and unwanted odor. Our innovative fabric safeguards your clothes, ensuring you stay fresh and dry throughout the day. Made from Tencel, our 4-way stretch fabric offers luxurious softness and an unbeatably comfortable fit, while providing unmatched breathability.

Stop Settling: Why Your Regular T-Shirt Isn't Cutting It as a Base Layer

Are you tired of your typical t-shirt failing to provide the comfort and functionality you need? It's time for a change. Let's face it: relying on a regular old t-shirt as a base layer just doesn’t cut it. Whether it's inadequate moisture management, lack of odor control, or discomfort due to seams and tightness, your current go-to isn't up to the task. But fear not! Upgrade to a base layer that offers seamless design, moisture-wicking magic, and a fit that flatters. Say goodbye to compromises and hello to ultimate comfort and performance.

✓ Stops Sweat Stains 

✓ Protects Clothes

✓ Stops Deo Marks 

✓ Feels Amazing

STOPS SWEAT STAINS

ABSORBS MOISTURE & ODOR

LIGHTWEIGHT & BREATHABLE

4-WAY STRETCH

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FITS TRUE TO SIZE

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EFECTIVE SWEAT-PROOF TECHNOLOGY = NO STAINS

Say goodbye to embarrassing sweat stains with advanced technology that stops sweat in its tracks, absorbing moisture and odor away from your body. This innovative solution keeps clothes dry and clean, ensuring confidence and comfort throughout the day.

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Stops Sweat Stains

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Absorbs moisture & odor

Bean-filled to sit in an upright position

ULTRA SOFT, LIGHTWEIGHT AND EXTREMELY COMFORTABLE

Stay cool and dry with breathable, thermoregulating fabric made from 90% Modal and featuring 10% Lycra® for 4-way stretch. Experience all-day comfort with this innovative blend.

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Lightweight & Breathable

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4 - Way Stretch (10% Lycra®)

Bean-filled to sit in an upright position

AlmondSignature-1800x1800.png__PID:c13a1c9d-979e-4628-b2e6-356512d44e6e
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A VERSATILE, FLATTERING FIT

Achieve seamless elegance with our slim-fit design that remains invisible under clothing. Tailored to be fitted yet never tight, our range comes in 6 styles and 7 colors to compliment any outfit

StopSweat-100x100-Icon.png__PID:2af92266-6a42-43d1-9b3a-4053b7480603

Stops Sweat Stains

OdorResistant-100x100-Icon.png__PID:f3579f39-47c4-4d7e-a59e-779c7ec0c30b

Absorbs moisture & odor

Bean-filled to sit in an upright position

Make the Switch

Invest in a Better Base Layer.

We Make It Easy For You

30 Day Money Back Guarantee

Experience peace of mind with our 30-day money-back guarantee. If you're not completely satisfied with your purchase, simply return it for a full refund—no questions asked.

Free Shipping

Enjoy the convenience of free shipping on all orders over $150. No matter where you are, we'll deliver your items straight to your doorstep without any extra cost.

Choose from 6 style and 7 colours

Express your unique style with our versatile options for different outfits. Choose from a selection of six styles and seven colors to find the perfect match for your wardrobe.

Here's What Our Customers Say

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 Difference Is Clear

CHOOSE NUMI

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Ditch Your T-Shirt and Experience the Numi Secret

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