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

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 506 reviews
Andrea G.
Which size did you purchase?: M
How was the fit?: True to Size
Reason for Purchase: Functional: for preventing sweat stains
I felt fresh and beautiful wearing this and I'll be buying it in every color.

It feels so good and looks great on every body.Totally worth every penny.

Elaine K.
Great undershirt!

This shirt matches my skin tone fantastically and works very well as an undershirt, even under boatneck tops.

Emilie d.
BEST wardrobe investment ever

Absolutely love the Numi Signature undershirt. It’s an investment I should have made a long time ago! The product delivers on its promise of protecting shirts from sweat marks and deodorant stains. The fit is snug and the sleeves are seamless, making it easy to wear under tighter-fitting blouses. The fabric is a bit see-through, but I don’t mind too much, as I wear it underneath my shirts. Definitely recommend!

Yup, I will buy more

I'm not a boardroom exec thankfully even though I own several companies, so the sweat thing was not why I was buying these. I bought these because I go through different energies for lack of better wording. There are times when I need to feel a second skin around my body. Now over 50, wearing skin tight anything - nope not built for that anymore. But I wanted to feel that layer close to my skin. I also like these because i can wear them under clothes and don't need a bra, there is no support though. It would be nice if the weave lent itself to a bit of support. the one thing i did not like, was the white one, had nude underarm pads, that that makes them stand out. They should be white. And the length is way too long. the shirt goes pass my butt, a bit of pain tucking into pants.

Julie A.
LOVE these tops!

I purchased 2 of The Signature tops (one in nude, one in white), and I am impressed!

I walk an hour each way to work, so I bought these tops with high hopes as the summer weather has been hitting us hard.. and I have to say, they do not disappoint! I also work as a physiotherapist, so I am constantly moving and teaching exercises. I was so impressed when I came home the first day after wearing my Numi top, and there was NO SIGN of any sweat!

The only reason I took off 1 star is because the white top is quite sheer so any non-nude bra is just not an option to wear underneath, which is a shame because I actually love the fit and look of the white top and would love to be able to wear it as a standalone piece as well as an undershirt.

Madeleine E.

I wore this undershirt to work on the hottest day of the year so far, and didn't have any sweat marks on my dress shirt. Revolutionary!!

Anne-Marie L.
The best undershirt for work

I just got a promotion for a manager position, and I suddenly had a need for shirts and undershirts and blazers!

The Signature undershirt saved my life in a 30 C degrees weather on my first day this week!

I love that I'm encouraging a Canadian brand as well.

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.

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.


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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