Premium Slim Fit

Molds to your body so it feels great. Moisture absorbing and stays tucked all day, so you’ll look amazing.

  • Icon Tailored
    Slim Fit
  • Icon Incredibly Soft

    & Won’t Pill
  • Icon Moisture
  • Icon 4-Way
  • Icon Stays Tucked
    All Day
  • Icon Sustainable

A Perfect Fit. Guaranteed

All of our undershirts are backed by a 100-day guarantee. Don’t love it? Contact us and we’ll make it right.

  • 20k+

    Happy Customers

  • 140k+

    Undershirts Sold

  • 100%

    Free Returns & Exchanges

The Best Slim Fit Undershirts for Men – Uncompromising Quality

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    Super-soft fabric

    The secret to UnderFit’s superior comfort starts with the fabric. We use a TENCEL™ fabric blend that feels great against your skin, provides all-day comfort all day and is built to last.
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    Lasting durability

    What good is an undershirt if it tears or has holes after only a few uses? That’s why we use durable TENCEL™ fabric in our shirts. Unlike cotton, it has an exceptionally high tensile strength, making it harder to rip and tear. It also means your undershirt will continue to keep its great shape after repeated wear and washings.
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    Greater breathability

    In addition to the softness, UnderFit’s TENCEL™ fabric also offers superior breathability. This means that your undershirt will help you stay cool when things start heating up.
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    Superb temperature regulation

    Whether you’re at work or out on the town, you want to minimize heat as much as possible to avoid excessive sweating. Our TENCEL™ fabric blend helps to regulate temperature to let your body breathe when the heat goes up.
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    Advanced moisture absorption

    Just because you’re perspiring doesn’t mean others need to know about it. UnderFit offers the best undershirts for men who sweat, thanks to advanced moisture absorption that stops sweat in its tracks, so the rest of your clothes stay dry and fresh.
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    Odor resistance

    TENCEL™ fabric has moisture-wicking technology to limit moisture, keep you dry and prevent odor-causing bacteria. It’s just like the moisture wicking you expect from high-performance workout apparel, but designed for your day-to-day lifestyle instead.
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    Eco-friendly & sustainable

    We care about the environment just as much as we care about making the best mens undershirt! That’s why we only source our raw material from sustainably grown forest plantations.