Designed to be discreet, especially if you like to wear your collared shirts with a couple buttons undone. Made for all-day comfort. Stay tucked and enjoy anti-odor protection with an incredibly soft, breathable feel.
We back all of our undershirts with a 100-day guarantee. We’re so confident in them that in the unlikely event that the collar ‘bacon necks’ or a seam breaks, don’t sweat it! We’ll gladly replace it with a new one.
The moment you put on an UnderFit undershirt, you’ll notice a huge difference compared to other undershirts you’re used to wearing. To design the best men’s undershirts, we analyzed everything we hated about traditional, poorly-made basics. That’s why we set out to make an undershirt that:
You don’t need a six-pack to rock an UnderFit undershirt. They say clothes make the man. At UnderFit, we know confidence starts underneath.
You’ll never want to take this undershirt off! Our undershirts are made from ProModal fabric, a highly-sustainable textile sourced from Beech Wood chips derived from the Birch Tree. The trees are sustainably farmed and our manufacturing process is “closed-loop,” meaning there is little to no waste.
Menswear experts universally praise the Invisible Undershirt
Gotta tell you, it’s a very nice product. Good fit, good feel, good price. Comparatively, the UnderFit fits and feels very close (or as nice as) to the more expensive micromodal/lycra undershirts.
No rising, No billowing. We managed to get through a whole day without a single untuck from under our made-to-measure shirts.
The problem with most undershirts is that they’re just T-shirts. UnderFit’s shirts are made from lightweight yet durable fabrics with a touch of stretch and are designed to be worn under your shirts.
All of our undershirts are backed by a 100-day guarantee. Don’t love it? Contact us and we’ll make it right.
Free Returns & Exchanges
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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.
Highly recommend this shirt. Spent my while life hating undershirts but this one finally gets it right. I appreciate that the v-neck is deep enough that it doesn’t show in my uniform(USMC). Again, great product.
Fits as noted, comfy, still lets a little sweat through (I’m quite sweaty lol)
I was and am always super leery of FB things for sale. But the best thing I can say is I ordered 3 undershirts initially and just ordered 5 additional. And am going to try the boxers!
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 daughters 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 ordered a size larger than suggested by the guide. I would highly recommend Underfit Undershirts for anyone looking for an undershirt to wear with a dress shirt.