The Signature
The Signature
The Signature
The Signature
The Signature
The Signature
The Signature
The Signature
The Signature
The Signature
The Signature
The Signature
The Signature

The Signature

Regular price $65.00 USD
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Reimagined Basics

Everyday styling should be easy. Our hero product was designed to liberate your wardrobe. You call it a game-changer, we call it a better base layer. Either way, it’s our top seller for a reason.

Our Essential Undershirt collection was designed to keep you feeling fresh and your clothes clean.

  • Absorbent underarm gusset with Contemporary Cotton Technology
  • Thermo-regulating TENCEL™
  • Invisible fit
  • Reversible neckline with a scoop or crew neck
  • Seamless sleeves
  • Made in Canada
  • 90% TENCEL™ is soft, breathable and keeps you cool and dry
  • 10% LYCRA® for optimal stretch and comfort
  • Fabric is responsibly knit and dyed in Canada
  • Machine wash cold, tumble dry low
Being mindful of our impact has always been at the core of what we do. This year we’re taking it further. We are in the process of auditing our impact. Stay tuned, we'll be sharing the results later this year.
Free shipping on U.S. and Canada orders over $100. All full-priced U.S. orders are eligible for free returns within 30 days of your delivery date. Some exclusions may apply, learn more here.

Customer Reviews

Based on 529 reviews
78%
(415)
19%
(99)
2%
(13)
0%
(1)
0%
(1)
C
Christina D.
Which size did you purchase?: S
How was the fit?: True to Size
Reason for Purchase: Functional: for preventing sweat stains
Reduces wetness and odor

I am a very sweaty person, and these keep me dry during the work day. I am wearing shirts now that I would only normally wear in cold weather because the Numi shirts prevent sweat from reaching the shirt.

R
Rose
Which size did you purchase?: M
How was the fit?: True to Size
Reason for Purchase: Functional: for preventing sweat stains
Comfortable and confidence-boosting

This undershirt is buttery-soft and a game-changer for my workday. I can be the center of attention, as I need to be for my job, with SO much more confidence. I purchased this in more than one color and am happy I did so. Wish they were around when I was a teenager.

A
Andreja Š.
Which size did you purchase?: S
How was the fit?: Snug
Reason for Purchase: Functional: for preventing sweat stains
This really works!

This is a great shirt. I've worn it during my usual bike ride to work in 30 degrees Celsius (86 Fahrenheit), and there was no sweat on my clothes afterwards. This will be a lifesaver. I purchased my usual size S (even though the size questionnaire recommended to size up), which might have been a mistake because it's tight-fitting, especially with the extra underarm material, and I'm used to loose clothing. But I don't feel it that much during the day so I think it's just a matter of me personally getting used to more snug clothing.
All in all, if you're fighting with sweat stains, this is an item for you, and if you're not sure about the size, listen to the Numi algorithm :)

V
Veronique L.
Which size did you purchase?: L
How was the fit?: True to Size
Reason for Purchase: Functional: for preventing sweat stains
I was skeptical at first.. wow!!!

Ok I was totally skepticism at first, this product seemed too good to be true. Like I can actually wear the colourful tops I’ve always wanted to wear? That cute faux denim one piece? I swear I wore that one piece with the Numi top from 10am to 5pm running around hosting and preparing for an outdoor event. I was SWEATING! Let me tell you, I looked ON POINT! I was so comfortable and was so shocked that I could raise my arms no problem. I highly recommend this product.

A
Aarthi P.
Which size did you purchase?: S
How was the fit?: Snug
Reason for Purchase: Functional: for preventing sweat stains
Amazing

Wear these under my work shirt every day, keeps me warm and dry and I get more use out of my dress shirts!

R
Rebecca N.
Which size did you purchase?: S
How was the fit?: True to Size
Reason for Purchase: Functional: for preventing sweat stains
So soft; great fit

I just love these! Fabric is so soft and comfortable. Fit is great, true to size. I love that I can protect my delicate clothes from unnecessary washing! It will keep them looking great much longer. And of course, no visible wet underarms!

L
Louise
Which size did you purchase?: M
How was the fit?: True to Size
Reason for Purchase: Functional: for preventing sweat stains
It Works !!!

Ok I'm totally impressed!
I wore mine for the first time while traveling (which ended up being about a 15 hours day, including 2 different flights). I wore it under a light grey shirt...risky business! That grey shirt would normally not survive the trip without being drenched in sweat in the armpit area. I would always hide it with a cardigan or something on top...not this time !!!
It was still dry even after carrying/lifting heavy bags, feeling the summer heat in a crowded boarding process, being squished in an airplane middle seat, walking from gate to gate to catch the next flight and of course the usual stress of a travel day.
The undershirt was sweaty on the inside, but it never showed on my light grey shirt!!!
Numi is pure MAGIC !!!

Explore Our Fabric Technology

Sustainable Silk™

Meet the easy wear, easy care Numi silk collection. Wear your silk whenever, however. Stylish pieces made from Numi's Sustainable Silk that look and feel beautiful and are free from the standard silk stresses like staining and dry cleaning.

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Contemporary Cotton™

Liberate your wardrobe.  The Essential Undershirt, a cult product that changes lives and dry cleaning bills.  Wear that favorite shirt without a care.  Sumptuously soft base layers that keep you feeling fresh and clean, today and tomorrow.

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Forward Thinking Materials

Functional fabrics designed to make your life easier and be kinder to the planet.

Contemporary Cotton™ is a high-performance moisture management system that moves moisture away from the body.  It keeps you cooler and drier.  And washes clean of odors. 

Sustainable Silk™ is a blend of Naia™ and silk. It is treated with bluesign® certified stain repellent technology making the garment stain resistant and machine washable.

About Numi

Numi was born out of personal necessity. One day our founder, Michelle, realized she never wore her favorite clothes. They were either prone to noticeable sweat stains or expensive to dry clean. When she looked for a solution, there was nothing available. And so Numi was born.

Numi is a brand that celebrates what it means to be a woman. We make consciously created products that make life a little easier for us all and inspire a culture of kindness.

Committed to Sustainability

Being mindful of our impact has always been at the core of what we do. We like to think of it as a living commitment that grows and evolves with us. This year we're taking it further. We are in the process of auditing ourselves to see how and where we can be kinder to the planet.

Learn more

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