The Oura Ring 4 is a smart ring designed for comfortable everyday wear, offering advanced health monitoring capabilities. It tracks key biometrics such as heart rate, sleep patterns, and activity levels, providing detailed insights through a seamless smartphone app integration. With a long-lasting battery and wireless charging, the Oura Ring 4 helps you stay connected to your health and wellness goals. It is available in multiple finishes and sizes for a personalized style. The ring features an all-titanium design and a new sensing platform called Smart Sensing, which adapts to your body and provides insights into over 30 biometrics, including sleep, readiness, activity, heart health, stress, metabolic health, and women’s health. Discreet sensors monitor sleep, readiness, and daily activity. An Oura Membership (sold separately) unlocks advanced features like in-depth sleep analysis, personalized health insights, and live heart rate monitoring. The ring automatically detects activities and awards credits. The daily Readiness Score guides you on when to push yourself or rest. The Oura Ring 4 is comfortable to wear day and night, made from a non-allergenic, lightweight titanium design. Its battery lasts up to 8 days, and it is water-resistant down to 100 meters, allowing for swimming and water sports. It also monitors daytime stress levels, heart rate for cardiovascular insights, and skin temperature for illness detection and menstrual cycle insights. Note: For the best fit, purchasing the Oura Ring 4 Sizing Kit is recommended as sizing differs from standard ring sizes. Some tracking and insight features require an Oura Membership; non-paying members access 3 daily scores (Sleep, Readiness, Activity) and Explore content.