Updated review: I did not love the undershirts. They fit and they are as advertised, but too thin for my taste. Also I’m used to cotton and this feels very differently. It’s not for everyone. I... See more
Company replied
While we don't verify specific claims because reviewers' opinions are their own, we may label reviews as "Verified" when we can confirm a business interaction took place. Read more
To protect platform integrity, every review on our platform—verified or not—is screened by our 24/7 automated software. This technology is designed to identify and remove content that breaches our guidelines, including reviews that are not based on a genuine experience. We recognise we may not catch everything, and you can flag anything you think we may have missed. Read more
Created with AI, based on recent reviews
UnderFit undershirts are cut longer and lightly hug your hips and below, to stay tucked in all day. Our fabric is ideal for undershirts due to its exceptional softness, advanced moisture absorption, odor resistance and superb breathability. If you want to remain less comfortable in your run-of-the-mill undershirt, by all means, DON’T buy an UnderFit.
United States
Replied to 33% of negative reviews
Typically replies within 2 weeks
How this company uses Trustpilot
See how their reviews and ratings are sourced, scored, and moderated.
Underfit shirts have pretty singlehandedly solved my worry that I’d never find a tall enough under shirt. But it’s comfort makes it even better
Shirts are too long and I have a long torso and normally wear longs on my shirts. Love everything else about them.

Reply from UnderFit
Long undershirts don’t come cheap, but you get what you pay for. Very comfortable, feel great all day, longer than I need—and I’m 6’4”!
Very expensive and very worth it. The material is thin but flexible...and the length is long so nothing gets bunched up. Best undershirt I've ever worn.
My husband loves these shirts! I think for the fit it’s totaly worth the purchase, however I feel the quality is lacking. They yellow in just a few months time, seams are fraying and underarms are ripping. I have a lower priced shirt brand, that has withstood wear much better. I’m torn on my next purchase. Keep the fit, step up the quality.

Reply from UnderFit
Great feel, perfect form/shape, great customer support. Durability needs improvement. I wore these shirts daily (6 shirts in rotation), after 2 years the shirts are no longer wearable. They are super stretched out. They do not last as long as other undershirts.
I initially liked the shirts, but have found they don’t have very good longevity—they deteriorate pretty quickly.

Reply from UnderFit
Love the shirt but wish I could buy them one at a time, not in multi-packs.
They don’t last very long. They get really thin and stretch super long. Which was disappointing. After a year they were no good. So I didn’t buy them again. Considering the initial price I expected more- a six pack at Costco is the cost of 1 tee shirt but lasts like 3 years. It’s not nearly as good but at least it lasts.
The undershirts are great as far as the v and arm length. They fit great, but the armpits need to be made better. After a few uses they stain, hold oder, and at the same time dont absorb enough sweat to keep pit stains from being seen on the dress shirt. I dont perspire as much as most guys either.

Reply from UnderFit
Excellent product and service, I don't look anywhere else. Very comfortable and great fit.
Awesome shirts they work perfect for under dress shirts and sweaters.
Great shirts, great fit, loved them when I thought they were made in the USA. The new pack I received says made in Mexico. Like the shirts, but made in the USA is important to me and therefore I will find another supplier.
I see your reply, have you considered offering a made in the USA shirt option? At an additional cost?

Reply from UnderFit
Great shirts, I wear them everyday. Sometimes I just wear the shirt to go out
Anyone can write a Trustpilot review. People who write reviews have ownership to edit or delete them at any time, and they’ll be displayed as long as an account is active.
Companies can ask for reviews via automatic invitations. Labeled Verified, they’re about genuine experiences.
Learn more about other kinds of reviews.
We use dedicated people and clever technology to safeguard our platform. Find out how we combat fake reviews.
Learn about Trustpilot’s review process.
Here are 8 tips for writing great reviews.
Verification can help ensure real people are writing the reviews you read on Trustpilot.
Offering incentives for reviews or asking for them selectively can bias the TrustScore, which goes against our guidelines.