DetailsHighlightsSIZE BEFORE YOU BUY - Size yourself with the Oura Ring 4 Sizing Kit before you purchasing Oura Ring 4 Ceramic.ACCURACY WITH SMART SENSING - Oura Ring 4 Ceramic is powered by Smart Sensing, which adapts to your unique finger and activity — delivering accurate, continuous data, day and night.HOLISTIC HEALTH TRACKING — Oura provides over 50 health metrics, including sleep, activity, stress, heart health, metabolic health, and women’s health metrics.DESIGNED FOR 24/7 WEAR—Thoughtfully crafted in high-performance zirconia ceramic, Oura Ring 4 Ceramic combines refined elegance with everyday durability. The updated design is comfortable and is water resistant.LONG LASTING BATTERY - With 5 to 8 days* of battery life, no screens and no vibrations, Oura Ring 4 Ceramic allows you to focus on the present.FSA/ HSA ELIGIBLE - We can accept FSA or HSA funds for the following: Oura Ring, additional chargers, and shipping.MEMBERSHIP IMPROVES WITH YOU - First month of membership is on us with your purchase, $5.99/mo afterwards (or $69.99 annually). Enjoy access to continuous feature and app updates within the award-winning Oura App.SYNC WITH YOUR FAVORITE APPS - Compatible with iOS and Android —Oura seamlessly integrates with over 40 apps including Apple Health, Google Health Connect, Natural Cycles, Flo, Strava, & more.DescriptionOura Ring 4 Ceramic is a modern expression of our revolutionary smart ring technology that blends refined elegance with everyday durability. The high-performance ceramic exterior is designed to keep up with you and all that you do. The Ceramic Collection is available in three unique colors: Petal, Tide and Cloud. Each new color is built to accent your style and personality. This colorful new take comes with the same cutting-edge technology of Oura Ring 4. Track over 50 health metrics and get personalized insights into your sleep, activity, readiness, stress, heart health, metabolic health, women's health and more. It is built around a bre