4.7 Loved by 35,000+ Guys

Real Customers. Real Comfort.

The best undershirt is the one you forget you’re wearing. But don’t just take our word for it – see what the experts and our customers have to say.

I wear deep V undershirts most days with a few buttons undone. The beige is way less visible than my old white Tommy John. Size large fits perfectly.

Andy-D.-Review
Andy D.

Verified Buyer

I tried a wide range of brands before finding UnderFit. Now my drawer’s full of crew and v-necks I wear year-round. Comfortable in NYC’s freezing winters or sweltering summers. I won’t wear anything else.

James-B.C.-Review
James B.C.

Verified Buyer

I used to wear Thompson Tee, but UnderFit’s darker beige hides better under a white dress shirt. Wore it on my wedding day — looked great, felt great, and gave me the confidence to enjoy every moment.

Tristan-Z.-Review
Tristan Z.

Verified Buyer

Hands down, these are the best undershirts I have found. They are soft, comfortable, and most importantly they don’t show with my dress shirts.

Christopher-S.-Review
Christopher S.

Verified Buyer

Customer Reviews
4.7 Based on 658 Reviews
5 ★
82% 
540
4 ★
11% 
70
3 ★
3% 
23
2 ★
1% 
5
1 ★
3% 
20
Customer Photos
Write a Review Ask a Question

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
JB
01/13/2026
John B.
US US

Exactly What I Wanted

Ordering and delivery process was seamless. The shirt is exactly what I wanted, a relatively thin, long undershirt where I won’t be re-tucking the shirt in every few minutes.

SG
01/09/2026
Steve G.
US US

Extremely tight - donate pile

My usual size is XL but many times L is the better fit. I ordered an XL and it was skin tight. Skin tight is not comfortable for me. It was also quite thin - translucent. Not at all what I was looking for.

LV
01/08/2026
Louie V.
US US

Great undershirt at great price

The materials, sizing and quality are as good as any t-shirt on the market. I’m a business executive and it’s the perfect t shirt to put under a collared button down shirt or sweater. Highly recommend.

AI
01/08/2026
Alec I.
US US

Best Undershirt I've had

I have gone through about 4-5 brands of undershirts, all which had some pros and cons to each. I read some reviews and took a dive into the Underfit product, and these are hands down the best and most comfortable undershirts I've tried. I came back for a second round of shirts. Can't recommend enough!

DH
01/07/2026
David H.
CA CA

Beige and black Vneck

I have used Derek Rose low Vneck tshirts for a very long time. These are as good or better and very comfortable. Fit well and stay put and tucked. I like them and will purchase again.

The Best Fit or Your Money Back

Every UnderFit undershirt comes with a 365-day risk-free trial. If it’s not the best undershirt you’ve ever worn, we’ll make it right — no questions asked.

  • 35k+

    Guys Trust Underfit

  • 175k+

    Undershirts Sold

  • 100%

    Hassle-Free Returns