Patent-pending innovation
Literally like nothing
you've worn before.
You might think you've tried a built-in before. You haven't. This isn't a T-shirt with a shelf bra sewn in. It's a new way to build a garment. No more smushed uniboob. Dozens of prototypes. Patent-pending technology.
Look closer
A Completely Different Look & Feel On Your Body
Most built-ins squish your boobs, have removable cups, don't work for larger breasts, and are made for super-casual wear. undun provides remarkable support and shape, up to a G cup, and is elevated enough for work or a date — same idea on the hanger, a completely different thing on your body. Here's what's actually inside.
Every undun feature is part of our patent-pending construction— not just a strip of elastic in a tank top.
Here's the part nobody tells you
The built-in shelf bra was invented decades ago, and hasn't changed since.
For decades, brands could have made a better-feeling shirt, but never made the investment in innovation. A strip of elastic sewn into a tank was cheaper, so a strip of elastic is what you got — marketed as progress. No real support, no elastics worth wearing.
We made the change they wouldn't. Real engineered support, built into the garment, for a wide range of bodies A through G.
A brief, mildly tragic history of holding things up.
Women have been enduring painful chest support for centuries. Real, honest progress has been… rare. Here's the actual timeline.
The corset
Fabric stiffened with stays of whalebone, horn or wood and laced tight. It reigned, painfully, for roughly 500 years.
Cut in two
French inventor Herminie Cadolle sliced the corset in half, freeing the bust into a separate garment she called "well-being" — the first modern bra, shown at the 1900 Paris World Expo.
The brassiere, patented
Socialite Mary "Polly" Phelps Jacob patented a "backless brassiere," famously two handkerchiefs and some pink ribbon. The bra as we know it was born.
Cup sizes arrive
Manufacturers finally separated chest size from cup volume. S.H. Camp and Warner brought the A–B–C–D system to the masses.
The sports bra
Lisa Lindahl and friends sewed two jockstraps together into the first "Jogbra." Genuinely useful, and basically the last big idea for decades.
The "built-in"
A strip of elastic sewn into a tank, sold as innovation. It did approximately nothing, and nobody bothered to fix it.
Real, engineered support built into the garment itself, A–G. The first honest rethink in over a century.
Historical dates per "The History of the Bra," HISTORY.com. Commentary, our own.
The bra vs. getting undun.
- ✕ Wires that dig and straps that slip
- ✕ Band-and-cup math + fitting rooms
- ✕ A whole separate garment to manage
- ✕ Red marks. Compression. The 6pm unhook.
- ✦ Support engineered into the garment
- ✦ Two volume sizes, no tape measure
- ✦ One and dun.
- ✦ "Wait, am I even wearing anything?"
Four ways it works, zero compromises
Engineered support, baked right in.
No wires. No straps. No painful elastics. No separate bra. Here's what's doing the heavy lifting.
Patent-pending Lift
Fixed lift cups for every size, A through G. Real hold, no wires.
Patented Lift
Fixed lift cups for every size, A through G. Real hold, no wires.
Patent-pending Layers
Breathable engineered mesh. Invisible under anything. No bulk, no heat.
Patent-pending Shape
Sculpting without the squeeze. No compression, no red marks.
Patent-pending Comfort
Seamless elastic-free underband for all-day wear. You won't feel it's there.
No wires. No straps. No separate bra. Ever.
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