Why is everyone wearing the Oura Ring? – Vox.com

Why is everyone wearing the Oura Ring?  Vox.comThis $350 Oura Ring 4 Tracks Your Sleep. Is It Worth the Splurge?  The New York TimesWhy the Oura Smart Ring Has a Cult Following  The Wall Street JournalOura Ring 4 review: still on top — for now  The VergeOura Ring 4 Review: My Favorite Wellness Tracker Comes With a Pricey Caveat  CNET