Oura Ring 4 Gold Smart Ring Size 8 DESIGNED FOR 24 7 WEAR The updated design of the Oura Ring 4 is more comfortable, fits better than ever, and is water resistant. The first all titanium smart ring combines exceptional durability with Circular SLIM progress, but is it enough? Comprehensive review by FITNESATOR Medium Oura Ring Review: My Thoughts After 5+ Years Oura patents smart ring with interchangeable battery Notebookcheck News I've wanted an Oura Ring forever to track my sleep, recovery, stressespecially with everything I've been working on with healing post car accident! And now it's FREE. AND a vibration plate is