This Amazon deal marks the first-ever discount on the new generation of the stylish, celebrity-loved smart ring.

The Oura Ring 4 also provides new features like real-time stress tracking, continuous heart-rate monitoring, and more precise temperature sensing. All of this is designed to give you more precise and helpful feedback during the day. The ring’s interior has also changed from an epoxy to all-over titanium for a lighter feel.

Get 15% off the Oura Ring 3 and Oura Ring 4 (newest model) during the final day of Prime Day today, in all shades and sizes.