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🔥 Last Day Sale – 49% OFF! ⏰ The Essential V-Neck Undershirt
🔥 Last Day Sale – 49% OFF! ⏰ The Essential V-Neck Undershirt
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OUR 365-DAY COMFORT GUARANTEE
365 days. That’s how long you have to decide if UnderFit is your most comfortable undershirt. If it ever lets you down — collar, seams, or comfort — we’ll make it right.
SIZE & FIT
- Tailored fit to give you a slimmer profile. Order the size you’d normally wear in a t-shirt.
- Unsure of what size you are? Or, are you in-between sizes? We recommend that you choose a smaller size as our undershirts have a great ability to stretch.
MATERIALS & CARETOP 5 BENEFITSFor the ultimate care of your UnderFit undershirt, please follow the care instructions below. These instructions can also be found on the itch-free neck label undershirt.
- 57% Modal / 38% Lyocell / 5% Lycra (Spandex)
- Machine wash cold
- Hang Dry
- Low heat tumble dry if desired
We also recommend that our undershirts are turned inside out for every wash.
- Incredible comfort: Our fabric blend is twice as soft as cotton, making you feel like you’re wrapped in a cloud of coziness all day long.
- Built to last: With high tensile strength, TENCEL™ ensures that your undershirt retains its shape and stays resistant to tears, even after countless wears and washes.
- Stay cool and fresh: The fabric in our undershirts provides fantastic breathability and temperature regulation, so you’ll feel like you’re wearing built-in air conditioning during those hot summer days.
- No more sweat stains and odors: Say goodbye to embarrassing sweat marks and unpleasant odors, as our moisture-wicking TENCEL™ fabric keeps you dry and smelling fresh throughout the day.
- The perfect fit and style: Our undershirts boast a slim-fitting design, tailored cut, and added length to stay tucked in, providing a comfortable and stylish fit that’s ideal for layering and enhancing your overall look.

The Most Comfortable Undershirt You’ll Ever Wear
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:
✔️Works for the office, a night out, or around the house.
✔️Features the highest-quality, comfortable fabrics.
✔️Stays tucked in all day long (with no “undershirt gut”).
✔️Offers anti-odor and advanced moisture absorption.
A Perfect Fit That Keeps You Cool, Crisp, & Confident
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.
✔️Look slimmer and feel more confident.
✔️Stays tucked all day, no matter how you move.
✔️Moisture wicking & odor resistant fabric keeps you feeling fresh.
✔️Tailored fit hugs your biceps and waistline to eliminate lines and “t-shirt bulk” around your middle.
Ridiculously Soft & Sustainable
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.
✔️All-day breathability. Soft, light, and flexible.
✔️Excellent durablility. No pilling after extended wear.
✔️Wicks 50% more moisture than cotton.
✔️1/20th the environmental impact of cotton.
You’re A Reviews Person? We Got The Receipts
Menswear experts universally praise the Invisible Undershirt
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Tug
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.
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Valet Staff
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.
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The Gents Staff
No rising, No billowing. We managed to get through a whole day without a single untuck from under our made-to-measure shirts.
Customer Reviews
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Beauty Maven
You can’t even feel your wearing anything. 10+ hours of wearing it feel great tucked in all day!
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MAS
I rarely leave reviews, but this company has some of the best customer service I’ve seen in a very long time. I had questions about sizing, and Leigh, the owner, personally thanked me for my purchase and answered all of my questions quickly and thoroughly.The product itself is amazing. The shirts are incredibly soft and long enough to actually stay tucked in all day. Ordering and working with the company was such a pleasant experience. My husband is looking forward to wearing these for our son’s wedding and being comfortable without the bulky feel of a regular undershirt.They are also one of the few companies that offers a true beige color, which is a must-have under white or light-colored shirts. No more silhouettes or lines showing through!I definitely recommend this company and will absolutely order again.
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Dain Ehring
Everything I have been looking for in an undershirt! Fitted, very light material that doesn’t trap sweat. Perfect!
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Shruti Steele
I ordered 5 shirts for my husband. He tried on one and the sizing wasn’t right. He trends between medium and large, I ordered some mediums, some larges. We are returning the order to try to get the right mix of v neck and crew neck in size large. But he likes the shirts, they lay well under clothes and take away some bulk. He decided to reorder 10 to get the multi-shirt pricing. So he’s hopeful enough about the shirts to stick with it!
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Lenny Miles
I really enjoy this brands v neck T shirts. I wish the V could be a tad bit deeper. But I love the fit
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Trey
I don't usually wear real undershirts; however, for a wedding where I was wearing a white linen shirt, I wanted something that would keep me cool but also keep my chest hair under control. I have to say, wearing this was a little different because it's so clinging to my body, but that made it actually feel like it disappeared underneath the shirt. I had my wife examine it in bright sunlight, and she confirmed it was completely invisible. Thanks, guys. Great job.