I Cut Open My Underwire Bra. What I Found Inside Explains Why You've Been Uncomfortable for Years.

Maja K.

March 28, 2026 · Copenhagen

Let me show you something that changed how I think about bras forever.

I took a pair of scissors to my old underwire bra last month. Not because I was angry — although, honestly, years of rib pain might justify that — but because I wanted to see what was actually pressing against my body for 12 hours a day.

Me, in my car, the day I decided I was done with underwire.

Inside, I found a rigid strip of metal. Bent into a U-shape. Wrapped in a thin layer of fabric so you'd forget it was there.

That's it. That's the "support system" we've all been wearing since we were teenagers.

This is what I pulled out of my bra. A rigid strip of metal — pressed against my ribs, every day, for 15 years.

A piece of metal, pressing into the softest part of your ribcage, all day, every day. And when it digs in, when it leaves those red marks, when you unhook it at a stoplight because you physically can't take it anymore — we blame ourselves. Wrong size. Wrong brand. Wrong body.

It's not your body. It never was.

But here's where it gets worse.

Like most women, I eventually switched to wireless. I'd had enough of the digging, the red lines, the suffocating feeling. I bought three different "ultra comfortable" wireless bras that promised everything.

They delivered on exactly one thing: no wire.

But they also delivered no lift. No shape. No support. I looked in the mirror and felt… flat. Deflated. Like I was wearing a sports bra from 2006 that had given up on life.

So I did what every woman does — I went back to underwire. Because at least it gave me a shape, even if it hurt.

That's the trap. You bounce between pain with shape and comfort without it. Year after year. Brand after brand. Fitting after fitting. And at some point you just accept that this is how bras work.

Then someone explained WHY — and I haven't looked at bras the same since.

A friend of mine — the type who researches everything — told me something I'd never considered:

"The problem isn't underwire vs. wireless. The problem is how force works in a bra."

Here's what she meant. In a traditional underwire bra, ALL of the lift force gets concentrated onto two narrow lines — the wire underneath each cup and the two thin straps over your shoulders. That's it. Your entire bust is being held up by maybe 30 centimetres of rigid metal and two strips of elastic.

Of course it hurts. It's not designed for comfort. It's designed for structure. Your body is an afterthought.

And when wireless bras removed the wire? They removed the force entirely. Nothing replaced it. That's why you felt flat. The lift disappeared because the only thing creating it — the metal — was gone. And nothing took its place.

Left: what's inside your underwire bra — rigid metal, rough stitching, thin foam. Right: what's inside a jelly bra — soft, dense gel that spreads support across the entire cup.

When I read about this, something clicked. It wasn't that I needed a better-fitting wire, or a more expensive wireless bra. I needed something that replaced the wire's job with a completely different material. One that could lift without concentrating all the force on two painful lines.

The old way vs. the new way. Metal that concentrates force on a single line — or jelly that distributes it across the entire surface.

But does it actually work? I had the same reaction. "Jelly bra" sounded like a TikTok gimmick, not real engineering.

Then my friend sent me this video. Watch what happens when you pull the cup away from the body — and then let go:

The lift disappears the moment the jelly loses contact. And it comes right back the instant it does. Not pushed up. Not squeezed together. Redistributed.

That's when I understood. This wasn't just "comfortable wireless." This was a completely different engineering approach. The jelly does what the wire was trying to do — lift — but without concentrating all that force on a single painful line.

I ordered two that night from a Scandinavian brand called Sundaye — one nude, one cheetah print. They have a 30-day comfort guarantee, so I figured worst case I'd just send them back.

→ You can see the Sundaye jelly bra here if you're already curious.

The first morning I put it on, I kept checking the mirror.

Not because something was wrong. Because I couldn't believe the shape was coming from something that felt like nothing.

The lift was there. Not pushed-up, not squeezed together — just… lifted. Like my natural shape, but supported. The way I always wanted underwire to look but without the rigidity.

I put on a fitted V-neck — the kind I'd stopped wearing because every bra either showed lines or the cups peeked out. I ran my hands down my sides. Nothing. No lines. No edges. No ridge where the band meets the cup. Completely invisible.

The V-neck test. Lift, shape, and zero visible lines underneath.

And then the real test: I wore it to work. Full day. Meetings, commute, desk, lunch, more desk. Eight hours.

At 5pm, I realized something strange. I hadn't thought about my bra once. Not a single adjustment. Not a single strap pull. No shifting it around under my shirt. No counting the hours until I could take it off.

For the first time in my adult life, I forgot I was wearing a bra.

That night, I didn't rip it off the second I walked through the door. I actually kept it on while making dinner. That has literally never happened.

I texted my friend: "Why did nobody tell me about this sooner."

She replied: "I know. I own four."

The Sundaye Jelly Bra. Available in 12+ colours.

Look, I'm not writing this because I think everyone needs to cut open their bra. I'm writing this because I spent 15 years blaming my body for something that was an engineering problem.

The wire was never designed for your comfort. It was designed for structure. And when the industry removed it, they didn't replace it with anything. They just left you with nothing and called it "wireless."

The jelly bra is the first thing I've worn that actually solves the problem instead of choosing one side of it.

Lift without pain. Shape without rigidity. Comfort you literally forget about.