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.
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Is UnderFit legit?
UnderFit (underfit.com) has a 4.3 out of 5 rating on OK.one, based on 101 user reviews collected here. It is listed under Shopping & Fashion and its reputation is good. 83% of reviews are 4 stars or higher and 14% are 1 star; The business has replied to 64% of negative reviews; Reviews mostly discuss Product, Quality, Customer service. Last updated 2026-09-05.
What reviewers say
AI generated
Reviewers overwhelmingly had a great experience with this company. Customers frequently praise the exceptional comfort and soft texture of the undershirts, noting they feel wonderful and fit perfectly when worn. Consumers also appreciate the high quality and durable material that holds up well over repeated washes without losing shape or performance.
However, some people mentioned that certain items did not fit properly and required exchanges to get the right size. A few reviewers also noted occasional sizing challenges, pointing out that specific pieces felt too tight initially. Others experienced minor drawbacks regarding the fabric feel or material characteristics during warmer weather.
Auto-generated from all reviews of this business. For reference only.
Updated 6/27 - Someone was able to get in touch and process the order. Newer company so still trying to figure everything out. Shirts themselves are fantastic.
Ordered from the site and ordered the wrong size. Proceeded to follow the intentionally vague return policy (have to email someone in order to initiate return). After receiving initial response, they stopped responding to provide return/exchange details.
Reply from UnderFit2023-06-26
Hi Austen, I apologize for this issue. I dropped the ball on following up with your return. I reached out to you via email early this morning and would love to resolve this with complementary shirts and/or a full refund.
Best,
Leigh
I typically bike about a mile to pickup my wife a donut on the way to the train and by the time I get on the train I’m sweating and my polo smells. Today, shirt is completely dry, none of that weird deodorant/sweat smells. Could be one of my favorite clothing products I’ve ever worn man!
Damaged shirts and unsize and looks like used products. It looks like a complete scam. There is no return address or no refund available
Reply from UnderFit2023-04-28
Hi Rakesh, I’m sorry for you issue. I believe you purchased from https://underfitt.in/ which is a completely different business. We sell undershirts, primarily to customers in the US.
I am big on first impressions. I have been on the hunt for a new approach to fitted undershirts and sent off an email to UnderFit with a couple sizing questions. Response time was great with guidance. I pulled the trigger on a three pack. First day first shirt. Fitted. Well constructed-no weird seams. Plenty of length for my long torso. Threw one on under a cashmere shawl sweater. No sweat. Smooth as silk. Never knew I had it on. Not once. No small thing. Email follow up upon order is awesome-every single step of your order placement through delivery is email notified. If customer service matters, read the way they handle complaints here-professionally and with care. Now, I did discover I had tiny man nipples :-) wearing my new UnderFit. My wife said it was cool. First impressions matter :-)!
Really a comfortable shirt. The material feels light and the fit is great. I liked that they are easy to keep tucked and don’t billow or wrinkle up at all.
These are the only undershirts my husband will wear. I first bought them for him in 2016 (it's now 2022). They have held up incredibly well over 6 years, and I am only now replacing them as the armpits have understandably greyed - though not nearly as fast as others have in the past. Would highly recommend them!
Also great that they have a tall size - my husband is 6'6" and very skinny - these fit him perfectly.
Last year, I ordered two UnderFit crew t-shirts. I was very pleased with the material and the fit. Unfortunately, possibly through my fault and using the wrong cleaning solutions, they became a bit discolored after washing them. In contacting the company, Leigh McKenzie, was very responsive, engaged me in a conversation and provided me with an opportunity to try another two pair at a bit of a discount. In fact, she responded to my emails late at night, over the weekend and on a holiday. Now that is customer service!
I struggled for years to find the perfect undershirt, this might be it. The cut of the V-neck is just right to wear with an open collar. The fit is perfect, not baggy but not too tight either. I love the fabric. Soft to the touch and seems to stand up to multiple washings so far. Very happy with these shirts.
Great shirts and great customer service. I ordered 3 v-necks and got 2 V-necks and a crew sent to me. As soon as I reached out to customer service they responded by sending the 3rd v-neck. The shirts are very comfortable and stay tucked in all day. Definitely will buy from them again.
I ordered five v-neck shirts for my husband. They seemed fine, but he preferred a crew neck style. I attempted to contact the company multiple times through the email address they provided, but they did not respond. You can't have a company without customer service. Their "no questions asked" return policy seems to mean that "customers may not ask any questions or return items." Very disappointed.
Updated six months later: The owner of the company has contacted me and has offered explanation for the lack of communication last fall and plans for moving forward with more attention to customer service. I am hopeful that this will be the case for all of their business going forward.
Love these shirts. Instantly notice the difference in sweat-wicking, dry and cool feeling. I was getting sweaty pits at work with other shirts. Not any more. That’s what makes it absolutely worth it for me. I usually wear size S in men’s clothing. Sized up to M for these which was just right.
This was my third order. I tried a couple t-shirts, loved me and ordered 10 more. That was at least 4 years ago. This order was for 10 undershirts, love the tight fit, stays tucked, and are plenty long. Hold up well, buy in is high but value pays off over time.
Underfit makes the best undershirts and it isn't close. The only ones that stay tucked all day no matter what I'm doing. Can't recommend highly enough.
company was very response when I reached out to them via email re a question I had in an order.
Reply from UnderFit2019-11-19
Hi Eugene,
I apologize for the mixup with your order. Please send us an email at [email protected]. We’ll look into what happened with your order and make it right as soon as possible.
UnderFit t-shirts have been a great addition to my professional wardrobe. The quality is SUPERIOR to similar products of national repute. Easy decision - buy them!
I have 4 V neck undershirts purchased over a year ago and have worn them under a variety of shirts through varied year round climate conditions. I launder them with other whites, warm/cold, delicate setting. I air dry them on hangers. As such, they remain as new.
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