SIZE FIRST - Ultrahuman Ring sizes are different from standard ring sizes. Purchase Ultrahuman Sizing Kit first to get the perfect Ring AIR size. Ring AIR is available in 10 sizes from 5-14. THE RING OF YOUR DREAMS - Ultrahuman Ring AIR is the perfect sleep tracker ring. Along with insights on all your sleep stages — REM, Deep Sleep, Light Sleep and Wakefulness, get actionable steps to improve sleep so you're ready for the day. ENHANCED RECOVERY - Ring AIR is geared to help you recover better, with focused recovery tracking. The 'Dynamic Recovery Score' is derived from a blend of key metrics including heart rate monitoring, Heart Rate Variability (HRV) and skin temperature that track not only sleep but also every aspect of your lifestyle, giving you actionable insights. Designed to evolve with you, Dynamic Recovery will update in real-time when you take naps, sauna sessions or any contributors to enhance your recovery.
