How does the Tech Merino fit compared to your other boxer brief styles?

The Tech Merino runs smaller and shorter in the rise than our Jersey and AirKnit styles. If you typically wear a Medium in those styles, we recommend sizing up to a Large here. The narrower fit is intentional for a more contoured feel throughout the day.

What's the fabric blend and how does it feel?

You get merino wool for temperature regulation and moisture management paired with ultra-light modal for softness and breathability. The result is fabric that feels exceptionally soft against your skin while delivering merino's technical performance year-round.

Can I throw these in the dryer?

No, do not tumble dry these. Air dry them to preserve the fabric integrity and prevent the waistband from curling or loosening. This one step keeps them looking and feeling like new for months.

Are these good for everyday wear or just specific activities?

These perform equally well for everyday comfort, long work days, running, or relaxing at home. The merino wool regulates temperature whether you're sitting at a desk or moving around, and the fit stays in place without bunching or shifting throughout the day.

Will the waistband stay tight or will it loosen over time?

The waistband can loosen or curl if you tumble dry, but if you air dry as recommended, these hold their shape and support for years. Proper care is key to maintaining the fit you got on day one.

Mack Weldon Tech Merino Boxer Brief | Soft Performance Underwear

IN CM

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Micro-Brushed French terry

So you get an ultra-soft feel (that doesn’t fade in the wash).

image of man wearing navy blue sweatpants

Streamlined Fit

So you can wear them anywhere.

close up of the waist band of ACE sweatpant

Perfect Stretch + Recovery

So they’re always comfortable, but never saggy.

close up of ribbed cuff on the ankle of ACE navy blue sweatpant

Back-Ribbed Ankle Cuffs

So they maintain their shape at the hem.