Will this tank keep its shape after washing?

Yes. The stretch rib knit is engineered specifically to resist stretching out, so you'll maintain the fit wash after wash. Customers report no shrinkage even after 9+ months of regular wear.

What's the 18-Hour Jersey fabric, and how does it feel?

It's our signature fabric that balances softness with durability. You get a comfortable, absorbent tank that feels great against your skin while holding up to daily wear. The stretch rib knit adds recovery so it won't bag out under your shirt.

How should this tank fit under a dress shirt or t-shirt?

You want it fitted but not tight. It should sit close to your body without bunching or showing under a button-up. The stretch rib construction keeps it snug at the neckline and armholes so it won't shift around throughout the day.

Is it machine washable and dryer safe?

Machine wash and tumble dry. The 18-Hour Jersey fabric is built to handle regular laundering without losing shape or softness.

How is this different from other undershirts I've tried?

The combination of our 18-Hour Jersey fabric and stretch rib knit sets this apart. You get better comfort and absorbency than basic alternatives, plus the rib construction actually maintains its fit instead of stretching out with wear.

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.

Designed for Days Like This

Name: 18-Hour Rib Tank
Brand: Mackweldon
SKU: M01T17-BW-S
Price: 32.0 USD
Availability: InStock

Designed for Days Like This

We made the 18-Hour Rib Tank for the layer that does more work than it gets credit for. Ribbed cotton with a close-to-body fit that breathes under a shirt as easily as it stands on its own. Visible or hidden — it earns its place either way.