She left a Silicon Valley VC to solve a problem left untouched for 88 years. Now her bra brand is the fastest-growing at Nordstrom

As Women’s History Month comes to a close, here’s a little bit of trivia for you: One of the premier patents in bras hadn’t been touched or improved upon in 88 years. That was until Bree McKeen went after it. 

In 1931, inventor Helene Pons was granted a U.S. patent for a brassiere featuring an open-ended wire loop that encircled the bottom and sides of each breast. That uncomfortable, unyielding design had largely been left unchanged for nearly a century—and remains the dominant style in the global bra market, which is expected to reach nearly $60 billion by 2032. 

Nobody had filed a patent for an underwire replacement until McKeen, founder of Evelyn & Bobbie, left her Silicon Valley job to try to fix a personal problem. At the end of long work days working at a boutique venture capital firm doing due diligence on consumer health care companies, she would come home with divots on her shoulders and chronic tension headaches after being hunched over her desk for hours on end. 

While the world was demanding, the culprit wasn’t her workload. It was her bra. 

But McKeen had zero experience in fashion. She studied medical anthropology and earned her MBA from Stanford. The turning point for her, though, came in a physiologist’s office, where McKeen had been working on her posture, along with regular barre training. 

“He’s like, your posture looks great,’” McKeen recalled to Fortune. “And I kind of blurt it out: When I stand like this, I get pain from my........

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