In an expansive sun-drenched SoHo studio-cum-office, fashion-writer Leandra Medine Cohen passes a hulking ring my way, upon which a juicy diamond puckers up from a puffy gold cigar band like an erect nipple (a four-carat one, to be exact). At first glance, the gleaming adornment looks like a pretty bounty plucked from my bubbe’s safe-deposit box. But when I flip it over, I see it features a sliced-open band made to house an unholy piece of tech: an Oura Ring.

Medine’s friend Yael Aflalo is a fan of said detestable technology. The founder of the popular Los Angeles–based women’s-clothing-and-accessories brand Reformation, Aflalo is a wizard of all things luxe. (Think: supple knits and sharp coats reminiscent of Sharon Stone’s wardrobe in Basic Instinct and red-hot pants that hold up a butt cheek like Atlas lifts up the world.) Her second act is her namesake brand, Aflalo.