The Oura Ring 4, the latest version of the brand’s smart ring, tracks multiple health metrics, including heart rate, sleep stages, stress levels, body temperature and blood oxygen. It also automatically detects and logs exercises like walking and running, and you can manually record the start and end of any workout via the Oura app.

There are still plenty of great deals available, including our pick for the best value mattress, the DreamCloud Classic, which is 59% off right now.