When the world’s most powerful people jet off to the annual summit hosted by Allen & Co. in Sun Valley, Idaho, to brainstorm and talk deals, they adopt a sartorial style we might call mogul casual. The latest confab, which has become popularly known as the Billionaire Summer Camp as it has ...

While tech executives like Amazon's Jeff Bezos and Meta's Mark Zuckerberg were ultracasual, some of the more style-conscious female attendees dressed up a bit.

When the world’s most powerful people jet off to the annual summit hosted by Allen & Co. in Sun Valley, Idaho, to brainstorm and talk deals, they adopt a sartorial style we might…