(4.82) Read Reviews

The Classic Crew Neck Undershirt

$36.00

Our crew neck is perfect if you like to wear with your shirts fully buttoned up. Stay tucked and avoid embarrassing sweat stains with an incredibly soft, breathable feel.

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

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

The Most Comfortable Undershirt Youā€™ll Ever Wear

The moment you put on an UnderFit undershirt, youā€™ll notice a huge difference compared to other undershirts youā€™re used to wearing. To design the best menā€™s undershirts, we analyzed everything we hated about traditional, poorly-made basics. Thatā€™s why we set out to make 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.
Slim fit crew neck undershirt moves with you
Crew neck undershirt with gray quarter-zip sweater

A Perfect Fit That Keeps You Cool, Crisp, & Confident

You donā€™t need a six-pack to rock an UnderFit undershirt. They say clothes make the man. At UnderFit, we know confidence starts underneath.

  • 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.

Ridiculously Soft & Sustainable

Youā€™ll never want to take this undershirt off! Our undershirts are made from TENCELā„¢ fabric, 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.

  • All-day breathability. Soft, light, and flexible.
  • Excellent durability. No pilling after extended wear.
  • Wicks 50% more moisture than cotton.
  • 1/20th the environmental impact of cotton.
Crew neck undershirt with button down dress shirt

Itā€™s Easy to See Why People Get Obsessed

Hear it straight from the professionals

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

The Fit

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

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

Should I get a crew neck or a v-neck undershirt?

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˜…
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3 ā˜…
3% 
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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.