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.
Written by the business, not verified by us.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.
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.I made my first V-neck undershirt purchase back in 2016, and since then I have placed several more orders and could not be happier. They are extremely comfortable and hold up to daily wear and washings. The material thickness is perfect as I am in Florida, and it does get warm and traditional undershirts are too thick for summer wear. Finally, the material stretches while staying tucked into your pants so no re-tucking. It is a fantastic product and one I wear every day.
I received my Underfit Undershirt in a timely manner. I tried the undershirt on along with the dress shirt that I'm wearing to my daughter's wedding and I couldn't be happier with your product. I used the "Size and Fit guide" to be sure before ordering. I'm glad that I did because I almost recommend Underfit undershirts for anyone looking for an undershirt to wear with a dress shirt.
The shirts are just perfect. The material is super soft, just the right tightness and washes well. I ended up getting a few more to stock up! Just noticed new colors are added!!! Customer service is truly outstanding btw.
Outstanding fit, Fast shipping I’ve ordered 4 or 5 different brands of undershirt in an attempt to find what I want. From cheap ones on Amazon that shrink to $60 ones that are form shaping. These are perfect for me. The collar is tight, the shirt tail is long, the fabric is thin. If these hold up, I’ll never buy another undershirt. After over a year, collars are holding up and shirts are holding color. Love them.
I love the fit on these shirts and love the way it keeps you cool and dry at the same time, it will definitely protect your shirts from sweat.
Love the nude tshirts under my white dress shirts. They hold up well and the customer service is great.
I love these shirts, I have 3 of them. They feel great, are snug, don't show and as such, I have been wearing them for any shirt I want to protect from deodorant/sweat stains. Essential if you have nice shirts you want to keep around for as long as possible.
My son loves the v-neck undershirt. This is my 3rd purchase. I buy 5 each time and they last and last. The shirts are so very soft and keep their shape wash after wash. I would recommend the product.
The length for my tall size was not wrong. It was long enough for a tall person AND it was long enough to stay tucked in forever. The Vneck is low and wide enough not to show which is what the primary functional purpose of an undershirt is. The material is thin, but that is a plus because it is light and doesn't interfere with your clothing. Also, the stretch material is not constricting. Fantastic.
My boyfriend won’t wear any other t-shirts. These are soft, and fit so well. He likes how they also stay tucked in.
The return policy is fraudulent, they simply don't respond to your request. And the shirts kinda suck any way. Don't waste your time or money.
Hi Mike, this is Leigh — I’m the owner of UnderFit. I know this response is long overdue, but I still wanted to reach out and take responsibility for the experience you had. If your return request went unanswered, that’s completely on me. Since then, I’ve made real changes to make sure this doesn’t happen again. Support is now something I take much more seriously — every message gets seen and answered. If there’s any chance I can make this right, I’d be grateful for the opportunity. You can reach me directly at [email protected]. – Leigh Owner, UnderFit.com
Material feels nice on skin. Product works as advertised, really helps to deal with heat when wearing a full suit and is very thin so does not interfere with other layers. V neck can't be seen with a regular t shirt but prevents armpit sweat being visible which is good.
UPDATE: Leigh contacted me and made my order right by shipping my shirts as promised per his comments below. The shirts are breathable, great and don't smell like polyester tends to. Changing my review to 4/5 stars. 5 for the product but I can't ignore the 8 month wait entirely. ORIGINAL REVIEW: I ordered 12/15/23. My card was charged and I got an order number in a confirmation email. It’s 2/17/24 and no progress. I’ve tried emailing support several times and using their web form also. No response. I think this place is going out of business.
Hey Bryan, Thank you giving us the chance to make things right. I’m glad you’re enjoying the shirts and appreciate your understanding. I apologize again for the delay, and I’m committed to ensuring this doesn’t happen in the future.
I placed an order in mid November of 2023. I followed up after a couple of weeks as I never received shipping info. Leigh responded and said that the order didn’t process because the website let me place an order for an out of stock item. No problem I responded and said I would modify my order to something in stock. Since that I have reached out multiple times via email and through the website. It’s been radio silent since November 27th. At this point I just want my money back.
Hi Quinn, I sincerely apologize for the situation you experienced—this is entirely my fault. I take full responsibility for the communication breakdown and regret that it led to such frustration. I’ve followed up with you via email to make up for this situation and would love the chance to make things right. Please feel free to reply directly, and I’ll ensure your concerns are addressed. Again, I’m truly sorry for the trouble. We've taken steps to ensure this doesn’t happen again. Best regards, Leigh
Two of three undershirts are coming apart at the seems and still no response from customer service. Hello? Is anyone there? Leigh?
I ordered a shirt on Sept. 5, 2023, received a confirmation email from Underfit and my credit card was charged. It's now been exactly one month and my shirt has not arrived and when I check my order status on their website it say, "on hold". I've emailed them twice via their customer service contact and have yet to receive a response.
Hi Lance, this is Leigh — I’m the owner of UnderFit. I know this reply is way overdue, but I still wanted to acknowledge what happened. Your order was stuck, and your messages went unanswered. That’s completely my fault. Around that time, we had issues with fulfillment and customer support — and unfortunately, your order got caught in the middle of it. I’ve since made changes to fix both. Orders now ship fast, and I have a dedicated support team member. If there’s any way I can make this right for you, I’d really appreciate the chance. You can reach me directly at [email protected]. – Leigh Owner, UnderFit.com
I placed an order 8/28. Still shows "being processed" when I paid for 2-4 day shipping. Now at day 10. I've sent multiple emails to customer service and no response. I reached out via their social media. No response. I guess I got scammed???
Hi there, this is Leigh — I’m the owner of UnderFit. I know this response is long overdue, but I want to acknowledge your frustration and take full responsibility. Your order was delayed, your messages went unanswered, and that’s not acceptable. Since then, I’ve made major changes to fix this — orders now ship on time, and every message gets a response. If you’re open to it, I’d really appreciate the chance to make this right. You can reach me directly at [email protected]. – Leigh Owner, UnderFit.com
Such comfortable shirts. I'm a repeat customer because of the great quality.
Amazing, a professional working in the Middle East as a heavy sweater presents issues. Their undershirts offer peace of mind as well as comfort to allow me to be confident both socially as well as professionally.
I ordered one each of the three options a couple months ago as a trial. My drawer now contains 2 crews, 13 white V-necks, and 1 beige. The fit is perfect - snug to the body without any hint of compression (the close-fitting sleeves are especially nice), and the material is so soft and lightweight that it often feels like I don't have one on. Even under a polo top they feel like a "second skin". And the deep V and shorter sleeves truly keep them invisible. My only quibble, and it is a personal one, has to do with color. I have found that my white shirts, both dress and polo, demand a white undershirt - anything else makes them look dingy. Laundering and care are a breeze. Since I am a newcomer to Underfit, I will leave the issue of durability to others, but I understand that they have a very long life. In short, "undershirt defined". Behind this wonderful product is a website that is very user-friendly, and service and delivery that are absolutely top-rate (my longest wait for an order was 3 days). Bravo Leigh and Underfit!
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