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Review summary

Created with AI, based on recent reviews

Considering 49 reviews, reviewers had a great experience with this company. Customers consistently praise the product, highlighting its exceptional quality, comfort, and durability. Many people appreciate how well the undershirts fit, stay tucked in, and effectively wick away sweat, making them ideal for various climates and as an invisible layer under dress shirts. Reviewers frequently mention that these undershirts are the best they have ever owned, often replacing their entire wardrobe with them due to their long-lasting nature and superior feel. However, some people were dissatisfied with the customer service, reporting difficulties in receiving responses to their inquiries about returns, order issues, or quality concerns, and noting a lack of accessible contact numbers. A few other people also felt that the product material was too thin, felt synthetic, or did not adequately resist odors, and some experienced issues with sizing or seams separating after initial use.

What people talk about most

Product

Clients share positive opinions on product, with many reviewers praising the exceptional quality, comfort,... See more

Quality

Reviewers highlight positive aspects of quality, with many praising the perfect fit and exceptional quality... See more

Customer service

Users describe ambiguous interactions with customer service, with some reviewers praising the excellent... See more

Order

Reviewers mention ambiguous feedback about order, with some expressing satisfaction and plans for future... See more

Customer communications

Customers express significant dissatisfaction with the contact process, frequently reporting a lack of... See more

Reviews shaping this summary

Rated 4 out of 5 stars

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

Rated 4 out of 5 stars

I love the spec on the garment as you don't see it when you wear a shirt with first button unbuttoned. but the fabric is not good lot of my older shirts have the tencel or the modal burning out from... See more

Rated 4 out of 5 stars

Customer service informed me of what size undershirt they recommended me to order. This gave me more confidence in buying their product. The undershirts did not clear customs in New Zealand... See more

Company replied

Rated 5 out of 5 stars

These undershirts are above and beyond the best I've worn. They don't shrink or lose shape, they help wick away sweat more easily than cotton, and they always stay tucked in. The only thing you'd need... See more


Company details

  1. Men's Clothing Store
  2. Clothing Store

Written by the company

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.


Contact info

4.2

Great

TrustScore 4 out of 5

382 reviews

5-star
4-star
3-star
2-star
1-star

Replied to 33% of negative reviews

Typically replies within 2 weeks

How this company uses Trustpilot

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Rated 1 out of 5 stars

Fit advice by staff was amazing

Fit advice by staff was amazing. Suggested a small, bought small and it fit brilliantly. It is completely invisible under my dress shirt even with two buttons unbuttoned.

Not odor-resistant at all. I didn't even sweat and the smell from the armpit area even after wearing for only an hour was extremely noticeable. I don't like how it feels on the skin, feels too synthetic to me.

However, it doesn't ever come untucked when I wear these undershirts which is a bonus and customer service sounds like human beings rather than AI.

14 May 2026
Unprompted review
Rated 1 out of 5 stars

Questionable quality, even worse customer support

I ordered 2 UnderFit shirts, which feel quite soft and are comfortable to wear. However, I experienced immediate quality issues with a seam under the arm on 1 of 2 shirts separating after my first use. I contacted UnderFit for customer support and I initially received a response indicating they would help me with my quality concern, but then the communications abruptly stopped. Despite 3 attempts on my side to get help, UnderFit never again responded to me. Never before have I experienced that kind of disrespectful treatment from a brand claiming to offer a “premium” product (at a very high price point, as well). Overall, a very disappointing experience.

8 February 2026
Unprompted review
Rated 5 out of 5 stars

Not a great fit , now what?

Not exactly what I was looking for
I received two undershirts and after trying one on the fit was not right for me. This is always a risk with online purchases. I reached out to the return department and they make the process of return and refund simple.

26 January 2026
Unprompted review
Rated 5 out of 5 stars

Love these shirts!!

Love these shirts! great fit, durable material, and as an undershirt help keep my other shirts in better shape. I have been wearing Underfit shirts for over 5 years now, and still a happy customer.

29 December 2025
Unprompted review
Rated 5 out of 5 stars

Change of Heart

In the beginning I didn't care for the first shirts I bought from Underfit . The more I wear them, the more I have grown to prefer them over cotton. Now they are pretty much all I wear as an under shirt. That drove my decision to purchase more in different styles and colors. I would recommend giving them a try if you are on the fence.

10 December 2025
Unprompted review
Rated 1 out of 5 stars

My Canadian order was shipped to…

My Canadian order was shipped to someone in California. I have sent an email to customer service & the owner Leigh McKenzie over 3 days ago and have yet to hear from anyone at Underfit.
Their customer service is non existent!

6 November 2025
Unprompted review
UnderFit logo

Reply from UnderFit

Hi, thanks for calling this out. I should have responded faster, and that’s on me.

UPS had a tracking glitch that marked some packages “delivered” when they hit a transit facility in Torrance, CA, even though they were still in transit. Your order is either already delivered or still on the way. If it’s still en route, I can share the final-mile tracking link with the latest updates.

I’m here now and won’t leave you hanging.

Rated 1 out of 5 stars

No Customer Service

My order was delivered to an address when in the US when it was supposed to go to Canada. I have been trying to get a response from someone at Underfit but so far nothing not even an acknowledgment of receiving my messages.

4 November 2025
Unprompted review
UnderFit logo

Reply from UnderFit

Hi Patrick, I should have responded faster, and that’s on me.

UPS had a tracking glitch that marked some packages “delivered” when they hit a transit facility in Torrance, CA, even though they were still in transit. Your order is either already delivered or still on the way. If it’s still en route, I can share the final-mile tracking link with the latest updates.

I’m here now and won’t leave you hanging.

Rated 1 out of 5 stars

No customer service

Shirt didn’t fit well. Tried contacting customer service but no one replied after multiple attempts and can’t return.

27 September 2025
Unprompted review
Rated 5 out of 5 stars

Never shrink, stay tucked in!

These undershirts are above and beyond the best I've worn. They don't shrink or lose shape, they help wick away sweat more easily than cotton, and they always stay tucked in. The only thing you'd need to get used to is the slight see through material, which can be more noticeable with excessive chest hair. But it's an undershirt, so definitely not something to plan for!

2 December 2024
Unprompted review
Rated 5 out of 5 stars

With UnderFit, You Get a Lot for What You Pay For

UnderFit T-shirts are the best undershirts I've ever owned and will ever own. They're thin, they stay tucked in, they hold up great around the neck, and they last forever. I can't imagine wearing any other brand after going to UnderFit. Been wearing them for approximately 5 years.

26 August 2025
Unprompted review
Rated 5 out of 5 stars

Obsessed with these shirts

Obsessed with these shirts. Great fit, sweat resistant, comfortable and best of all, I can wear a white button up with two buttons opened and you won’t see it!

25 August 2025
Unprompted review
Rated 5 out of 5 stars

Excellent quality

Excellent quality. These were the first undershirts I have purchased in years, and they fit wonderfully. I like the way that they regulate temperature and moisture even on the hottest summer days. After over a year of wear, they're still reliable. I would highly recommend.

25 August 2024
Unprompted review

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