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 537 reviews
78%
(421)
19%
(100)
2%
(13)
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(1)
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R
Rachelle R.
Which size did you purchase?: M
How was the fit?: Snug
Reason for Purchase: Functional: for preventing sweat stains
Can't believe I thought about returning my Numi!!!

I just turned 48… No shame in telling a group of strangers (sorry, friends I haven’t met yet) on the Internet.

Since you’re on this site, reading this review, chances are you just might be a woman, about my age, figuring out just what sort of personal hell these things called “hot flashes” really are!

I get them all day, every day… All. The. Time. Having given up on wishing them away, unable to find the “trigger” or magic concoction to make them manageable, I’m investing the GDP of a developing nation on cooling sheets, fans, naturopaths, vitamins, and yes… a revamp of the wardrobe…

The wardrobe refresh is extra necessary. Fighting off the COVID 19 (more like 25 here), I’m just that much more conscious about taking my sweaty self out in public, which is exactly what I’m needing to do as I transition into a client-facing role and very soon to be returning to the world of business meetings and conference rooms.

The thought terrifies me already… I have nightmares of being 5 minutes into presentation to a key client executive team and the dreaded flash comes on. In my nightmare I remove my blazer, only to reveal a sweat soaked blouse underneath. This horror is my daily trip to the grocery store, so I’m not sure how it couldn’t be reality.

So, I did what any slightly proactive, overthinker does, I started googling things like “Lightweight breathable fabrics” and “What colours/materials do not show sweat”. Numi caught my eye early, and while I’m not sure I was fully convinced, all the models looked like how I envisioned future myself… put-together women who were ready to face this life change with grace and a smile.

Decided to try “The Signature”. Couldn’t decide the colour so I picked my 3 favourites, used the size recommendation of Medium (admitting that I was leaning towards the fluffier side), and put in my credit card number. Waited anxiously for what felt like forever until it ended up in my mailbox (I’m spoiled in the world of Amazon same day service, I had my Numis in 3 days I believe).

The packaging was so simple and elegant, came in a lovely bag that I’ll use for laundering, and the shirts felt lovely… A soft, light elastically material colours true to what was depicted… I was in love…

And then I put it on… or tried.

I remember reading they fit “snug” but it was WAY snugger than I expected… The fit felt so unflattering, the material was almost aggressively clingy, and I made a quick attempt to remove it with the full intention of returning the batch and resigning myself to being Queen Sweaty.

But just at that moment I was distracted by an incoming call, and some subsequent tasks that needed to be done. I walked past the mirror about two hours later remembering I still had the Numi Pink Signature on… and I looked pretty good. The once almost uncomfortably snug fit had relaxed just enough to be a gentle hug… I had truly forgotten completely how bothered I was by it... how ready I was to return it only a couple hours earlier.

And the best part.... I DIDN’T LOOK LIKE I’D SWEAT AT ALL.. Of course, I had… I think… I was busy with calls and tiding up the house and getting dinner and I’m sure the sweats would have attacked me a few times…. I mean really, I must have, but there was ZERO evidence… and I thought back over the couple hours… I realized for the first time in months, I actually felt human… Not like some hormonal body-snatched version of my former self, constantly worried that I’d look like ran through the neighbour’s sprinkler system, but a normal, contributing member of society.

It was at this moment I fell in love with my Numi…. She and I became best friends! 😊 I’m truly a believer and Numi and I will be conquering the world soon! (note: sadly it didn’t make me look like I lost 15-20lbs, but if someone in product design could get to work on that, it would be greatly appreciated :D)

Seriously…. If you’re coming to that change of life like I am, and have genuine paranoia that comes along with uncontrollable hot flashes, Numi is truly God-sent… I’m looking forward to knocking them dead in the boardroom… I can be the sweaty Goddess that I am meant to be, without anyone else knowing it but me 😊

Thank you NUMI!!!

P
Polly R.
Which size did you purchase?: S
How was the fit?: True to Size
Reason for Purchase: Functional: for preventing sweat stains
Performing well so far!

I’ve worn my Numi undershirt only a couple of times so far, and it’s been performing well. Sweat hasn’t soaked through to my shirt and made dark marks.

Initially, it felt a bit odd to have the extra layer, but I got used to it pretty quickly.

I like how long the shirt is so that it tucks in securely and doesn’t ride up.

I’m going to say the shirt is ‘true to size’ — it’s a snug fit, as it’s supposed to be, but not TOO snug. I wouldn’t want to wear an undershirt with a bunch of extra fabric and wrinkles!

E
Elizabeth I.
Which size did you purchase?: XL
How was the fit?: True to Size
Reason for Purchase: Functional: for preventing sweat stains
Great wardrobe staple

I take medication that makes me sweat a lot and these are great for wearing under any top both to stop me from looking sweaty and for making my clothes last longer. They fit well but I could have gone a size smaller, they're stretchy so a bit of a snugger fit would be ok. Good quality and comfortable.

S
Sonya L.
Which size did you purchase?: L
How was the fit?: True to Size
Reason for Purchase: Functional: for preventing sweat stains
Comfy and fresh feeling

I have worn one of the two shirts I bought, the 3/4 sleeve. I wore it on a plane where I want to be warm but not get too sweaty while transiting. My Numi top performed well. I was comfortable and warm while flying and didn't feel like it made me overly warm when schlepping around the airports I was in. I have yet to test it under a garment where I am concerned about under arm moisture being seen, but hopefully it'll perform well!

V
Vicki H.
Which size did you purchase?: S
How was the fit?: Snug
Reason for Purchase: Functional: for preventing sweat stains
Immediate confidence

Caffeine and stress have made me sweat since I was a teenager, and even highly-chemical prescriptions didn’t totally solve the problem. And once you start to sweat, the sweat itself makes you even more self-conscious and then more sweaty! At age 51, I finally decided to spend the money to try Numi. Just: wow. Can’t seen under very low cut and sheer tops. And, most surprisingly, you don’t feel the sweat that the shirt soaks up and so you don’t have that sweaty feedback loop. I couldn’t be more pleased and intend to continue to buy in multiple colors until I have one for each day of the work week. Very very grateful for this thoughtfully designed product. And very much worth the money.

A
Andrea D.B.
Which size did you purchase?: L
How was the fit?: Snug
Reason for Purchase: Functional: for preventing sweat stains
Comfortable & Works Awesome!

I’m so happy I purchased this shirt. I wore it under a grey long sleeve and did not have to worry about sweat marks! It felt amazing.
The fit was perfect…fitted but comfortable which was what I wanted. Love how you can wear the shirt two ways.
I do wish it wasn’t so see through so I could wear it alone. Also, I wish the padded underarm area wasn’t as noticeable, again, so I could wear on it’s own.
Looking forward to buying some more in different colours.

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.

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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