Mack Weldon

Be More Comfortable in a Better Undershirt

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Wouldn't you like an undershirt that stays tucked, doesn't bunch up,
and generally feels great? We did, so we made one. Our undershirts are designed
with a longer cut, slimmer fit, and softer fabric—our signature 18-Hour Jersey.

18-Hour Jersey

Our proprietary blend of cotton, smooth modal, and stretch Lycra®, this fabric sits for 18 hours before it’s cut. That’s how long it takes to naturally expand. The result is a softer feel and more consistent fit.

Mack Weldon

Shop By Style

Mack Weldon

Crew Neck

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Mack Weldon

V-Neck

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Mack Weldon

Rib Tank

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Feel It to Believe It

Try it on. If you don’t love it, let us know, and we’ll help you find the right fit. Returns are always free.

Get Comfortable