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Underwear built for all around comfort like nothing you’ve ever worn

Luxury and quality where you need it most

Easy online ordering and returns

Love it or your money back


Designed to solve your underwear problems

More support with less constriction

Ultra-soft fabric for optimal comfort

Moisture-wicking and odor‑fighting

Stays in place for less adjusting

Luxurious, high quality, and affordable

Shop by Style

Boxer Briefs

Perfect fit with longer legs that stay put.

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Modern, tailored fit with stretch technology.

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The classic style got an update.

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Shorter legs, great for slim fit denim.

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Shop by Fabric


Engineered for maximum breathability and infused with 4-way stretch, our exclusive AIRKNITx Technology promotes high impact performance with lightweight dry comfort.

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Shop 18-Hour Jersey

A proprietary blend of cotton, beech wood modal, and Lycra®, this fabric rests for 18 hours before it's cut. The result is a softer and more consistent fit.

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Silver particles naturally destroy odor-causing bacteria. We added Pima cotton to keep you cool and comfortable all day long.

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“When I was first considering these I read a review from someone who said he was going to replace all his old underwear with AIRKNITS. I thought this was a little bit ridiculous. Now I think I will eventually do the same over time. I would wear these every day if I had enough of them. They are that much more comfortable than everything else.”


“My husband will only wear these boxers. He says they keep him from not sweating and the wicking is the best and feels like you're wearing nothing.”


“Apparently I have been living my life with the wrong underwear. The fit. The breath-ability. The POUCH. I mean... I'm cool, comfortable, and now supported by more than my overbearing mother. I'm happy to start my new life with Mack Weldon.”


Try On Guarantee

If you don't love the first pair of underwear, we'll send you a different pair, or issue you a full refund - no return required.

Try Mack Weldon Underwear Today - Risk Free

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