
Mark Zuckerberg, Cristiano Ronaldo, Jennifer Aniston, and Prince Harry have one thing in common: They all own Oura Rings.
The Finnish company Oura, founded in 2013, is on the verge of a growth spurt as its niche innovation in wearable tech heads for the mainstream. Demand has boomed recently, with sales set to double this year and nearing the $500 million mark.