(4.82) Read Reviews

The Invisible Undershirt

$36.00

Our invisible deep v-neck undershirt disappears beneath your thinnest or light-colored dress shirts and outer layers. The light, breathable TENCELā„¢ fabric absorbs sweat, prevents odors and keeps you cool.

Size & Fit Guide
3 shirt
pack
Save 12%
6 shirt
rotation pack
Save 18%
10 shirt
stockpile pack
Save 26%
Free shipping on orders over $75. Free returns.

THE 100-DAY COMFORT GUARANTEE

We back all of our undershirts with a 100-day guarantee. Weā€™re so confident in them that in the unlikely event that the collar ā€˜bacon necksā€™ or a seam breaks, donā€™t sweat it! Weā€™ll gladly replace it with a new one.

FABRIC FEATURES

Icon
Tailored Fit &
Stays Tucked
Icon
Incredibly Softā€Ø &
Wonā€™t Pill
Icon
Super
Breathable
Icon
Moisture
Absorbing
Icon
4-Way
Stretch
Icon
Fights Odor
All Day
SIZE & FIT
MATERIALS & CARE
TOP 5 BENEFITS

The Invisible Undershirt Stays Hidden

No creases. No V-neck outline. Just seamless, invisible comfort.

With a white undershirt, you can see the v neck and sleeves under many light colored dress shirts.

An UnderFit undershirt stays hidden

With an UnderFit tone undershirt, the undershirt disappears. Our tone color works for both light and dark skin.

The Fit

Learn To Love Your Undershirts Again

UnderFit undershirts are just in a different universe compared to what youā€™re used to. We took everything we hated about basic undershirts – the baggy fit, the stagnant, non-stretchy materials, the static cling, the way they soak when you sweat – and made a product that solves for every single one of our complaints.

We believe men deserve better than what theyā€™ve been given for decades, and finally perfected an undershirt that:

  • Works for the office, a night out, or around the house.
  • Features the highest-quality, comfortable fabrics.
  • Stays tucked in all day long (with no ā€œundershirt gutā€).
  • Offers anti-odor and advanced moisture absorption.

Find Confidence You Didnā€™t Know You Had

Men have been working with what theyā€™ve been given, but what theyā€™ve been given is a bad undershirt experience. We know confidence starts underneath, and weā€™re ready to re-introduce you to comfort.

To look your best, you have to feel your best. You donā€™t need a rock-solid physique to rock the invisible undershirt. Our shirts work for guys of all shapes and sizes.

Hereā€™s what our customers told us they love about UnderFit:

  • Look slimmer and feel more confident.
  • Stays tucked all day, no matter how you move.
  • Moisture wicking & odor resistant fabric keeps you feeling fresh.
  • Tailored fit hugs your biceps and waistline to eliminate lines and ā€œt-shirt bulkā€ around your middle.

Pillowy Soft & Sustainably-Made

Our undershirts are made from TENCELā„¢ fabric blend, a highly-sustainable textile sourced from wood chips. The trees are sustainably farmed and our manufacturing process is ā€œclosed-loop,ā€ meaning there is little to no waste.

While weā€™re proud of making a sustainable product, weā€™re even more proud of just how ridiculously comfortable these undershirts are. Youā€™ll never want to take it off. Seriously.

  • All-day breathability. Soft, light, and flexible.
  • Excellent durablility. No pilling after extended wear.
  • Wicks 50% more moisture than cotton.
  • 1/20th the environmental impact of cotton.

Youā€™re A Reviews Person? We Got The Receipts

Menswear experts universally praise the Invisible Undershirt

Gotta tell you, itā€™s a very nice product. Good fit, good feel, good price. Comparatively, the UnderFit fits and feels very close (or as nice as) to the more expensive micromodal/lycra undershirts.

Tug
The Undershirt Guy

No rising, No billowing. We managed to get through a whole day without a single untuck from under our made-to-measure shirts.

The Gents Staff
Gents Among Men

The problem with most undershirts is that theyā€™re just T-shirts. UnderFitā€™s shirts are made from lightweight yet durable fabrics with a touch of stretch and are designed to be worn under your shirts.

Valet Staff
Valet Mag

A Perfect Fit. Guaranteed

All of our undershirts are backed by a 100-day guarantee. Donā€™t love it? Contact us and weā€™ll make it right.

  • 20k+

    Happy Customers

  • 140k+

    Undershirts Sold

  • 100%

    Free Returns & Exchanges

Frequently Asked Questions

If we havenā€™t answered your questions here, hit our chat or email us at service@underfit.com

TENCELā„¢ Fabric Feel

What makes it an invisible undershirt? Why is it beige?

Why do we use our TENCELā„¢ blend and not cotton?

Why do UnderFit undershirts cost more than cotton basics?

How do UnderFit undershirts stay tucked all day long?

What is the right fabric (moisture absorbing vs wicking) to wear?

Whatā€™s wrong with viscose, bamboo, organic cotton or other fabrics?

Where are the shirts made?

Finding The Right Fit

How does it fit?

Will it tighten to pull my belly in?

Will it feel tight?

Customer Service Questions

What if I try UnderFit and donā€™t like it?

What is your returns policy?

Do you ship worldwide?

Customer Reviews
4.8 Based on 474 Reviews
5 ā˜…
84% 
400
4 ā˜…
12% 
59
3 ā˜…
3% 
14
2 ā˜…
0% 
1
1 ā˜…
0% 
0
Write a Review Ask a Question

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
AM
10/13/2024
Adam M.
US US

Comfortable, and "invisible," but too long.

As the title says, they surprisingly work as advertised. I ordered the invisible undershirt, and it didn't show at all (I wore it under a white dress shirt with a light floral pattern), white my regular undershirts did (especially the sleves). However, I find the undershirt overly long. It bunches up near my waist, and if I pull it down, it goes well past my hips. Not sure why it's so long. Otherwise, a fantastic undershirt!

AA
10/12/2024
Adrian A.
US US

Best undershirts EVER!!

I have been searching for 7 years to find the perfect undershirt to wear to work in Florida where I sweat a lot. I ordered the white Vneck and absolutely love them.

DD
10/08/2024
Dennis D.
US US

All I Wear

Discovered these t-shirts a number of years ago and now they are the only ones I wear. Perfect for me in every way.

EP
09/20/2024
Evan P.
US US

Fantastic undershirts!

Underfit went above and beyond to get me some undershirts to try before my wedding and let me tell you-they are worth the buy! Exactly what I was looking for-cooling, will not show through a white shirt, deep enough V to unbutton 2 buttons, and tight to the body so wrinkles donā€™t show through. This is what an undershirt is meant to be.

JW
09/19/2024
John W.
US US

Game changer!

Silky smooth and close fitting, making shirts fit as intended: smooth and flattering.