The Ultrahuman Ring AIR is a smart ring designed for comprehensive health tracking, including sleep, movement, and recovery. It provides detailed insights into sleep stages like REM, Deep Sleep, Light Sleep, and Wakefulness, offering actionable advice to improve sleep quality. The 'Movement Index' promotes all-day activity for optimal glucose metabolism and increased energy usage. Workout tracking with a dedicated mode helps monitor heart rate during exercises for fitness improvement. Recovery is enhanced through the 'Dynamic Recovery Score', which uses heart rate, Heart Rate Variability (HRV), and skin temperature to track lifestyle aspects and provide real-time updates. The ring is made from space-grade titanium for comfort and durability, featuring a minimal form factor and precise performance. It offers up to 6 days of battery life on a full charge. No subscription is required to access all features on the Ultrahuman app. Additionally, it includes advanced women's health features, tracking ovulation, cycles, and pregnancy with personalized guidance. The ring is available in 10 sizes (5-14). For the best fit, it is recommended to purchase the Ultrahuman Sizing Kit first as ring sizes differ from standard measurements.