4.8 out of 5 – Read Reviews
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Stay Cool — Up to 30% OFF with SUNREADY 
Meet your new favorite undershirts
UnderFit undershirts solve every issue caused by the traditional cotton undershirt. Stays tucked in. 50% more breathable. No bagginess. Perfect fit, all day long.
“You have an amazing product. I’ve been wearing them through several iterations. I’ve tried your competitors, so I want to tell you that UnderFit is my favorite of them all.”
Ian Merrifield
Verified Customer Choose an undershirt
-
Tailored
Slim Fit -
Incredibly Soft
& Won’t Pill -
Moisture
Absorbing -
4-Way
Stretch -
Stays Tucked
All Day -
Sustainable
Production
Invisible V-Neck
$36Pair it with light colored outer layers for an invisible layer of protection.
White V-Neck
$36Deep v-neck stays hidden throughout the day. Exceptionally comfortable.
White Crew Neck
$36The classic crew is designed to be worn with fully buttoned up dress shirts or sweaters.
Gray V-Neck
$36Our light gray v-neck delivers a sleek look under buttoned shirts.
Black V-Neck
$36Our black v-neck is designed to blend seamlessly under dark clothing.
Gray Crew Neck
$36Our light gray crew neck is ideal for a sleek, modern look.
You’ll Love the Fit
Read 5 reviews to be convinced
10/25/2022
The Underfit shirts are the best. Period. There are no other undershirts that look or feel quite as good. I would highly recommend them to anyone looking for a perfectly fitting,...read more
Buy Once. Wear For Years
The biggest question we get from skeptics is why anyone would pay $30 for a single undershirt. But as the saying goes, “buy cheap, buy twice.”
We create undershirts you can wear day in, day out for years without losing their soft texture, shape, color, or moisture-wicking and anti-odor capabilities.
Trust Us, You’ll Look
& Feel Great
You don’t need a six-pack to rock an UnderFit.
Our slim fit undershirts are intuitively designed to mold to your form, instantly creating a slimmer profile without giving you that annoying “fabric pouch” you get from cheaper cotton undershirts when they’re tucked in.
Buttery Soft & Sustainable
Most clothing companies use viscose or just plain cotton, both of which require huge amounts of toxic chemicals, deforestation, and water waste just to create cheap basics.
By using a TENCEL™ fabric blend in our undershirts, we’ve developed a closed-loop production system that eliminates water waste and ensures all of our shirts completely biodegradable.
It’s Easy to See Why People Get Obsessed
See what menswear experts are saying
Gotta tell you, it’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
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
Gents Among Men
The problem with most undershirts is that they’re just T-shirts. UnderFit’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
Valet Mag