**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. **NO SUBSCRIPTION REQUIRED** Download the Ultrahuman app and get all of the available insights with no subscription. **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. **DESIGNED TO KEEP YOU MOVING** The 'Movement Index' is designed to keep you moving all day for optimum glucose metabolism, and to increase your non-exercise energy usage through the day. With this all-in-one activity and fitness tracker, you can track steps, workouts and calories for insights into your all-day activity. All features work together seamlessly, to make sure you get the most out of the smart ring. Workout Tracking is now easy, with a dedicated Workout Mode that tracks Heart Rate during workouts — you can get insights into your cardiovascular response, track intensity levels, and make informed decisions to improve your fitness outcomes. **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. **FUNCTIONALLY AESTHETIC** The Ultrahuman Ring AIR is forged with space grade titanium. Meticulously designed for enhanced comfort, this sleek device combines minimal form factor with precise performance, enabling users to effortlessly monitor key health metrics. The Ultrahuman Ring Air's ultra-light design feels so natural, you'll hardly notice you're wearing it. So, you can go about your day and sleep soundly at night, all while it does its thing. Your daily sleep score shows you how well you've rested. You can track your sleep stages, see what's getting in the way of your shuteye, and unlock personalised tools for a better night's rest. Dynamic Recovery keeps an eye on key indicators like sleep, stress, skin temperature, and HRV. So, you can make time for a power nap or breathwork exercise.Good to know- PowerPlug discreetly monitors your heart rhythm to detect early signs of Artial Fibrillation (AFib)- Create better habits with reminders to get some Vitamin D, optimise your caffeine intake, or cut down on screentime- Keep tabs on your everyday activity with VO2 Max, steps, distance, and calorie tracking- You can track your menstrual cycle and get insights into your fertility windows and symptom patterns- The outer shell is made from tough titanium with a carbon coating to resist everyday wear and tear- It charges in just 90 minutes, and you get up to 6 days of battery life Not sure of your ring Size: Choose the right size from the Ultrahuman Ring AIR sizing kit available on Amazon or use the Ultrahuman Ring sizer app on IOS Sleep Index is derived to help you understand the various sleep stages such as Deep sleep, REM sleep, Light sleep and being Awake. During different stages of sleep, different metabolic processes of the body occur for growth, repair, restoration, and maintenance. Movement Index is designed to help you move across the day enabling better metabolism and cardiovascular functioning. Track your steps, calories, metabolic equivalents (METs) and more. Recovery Score provides insights into various signals your body sends throughout the day, enabling a deeper comprehension of its needs. It is derived from a blend of key metrics, including Heart Rate Variability (HRV), Heart Rate, and Skin Temperature, interpreting the signals your body sends and enabling you to monitor your overall well-being. Workout tracking: The Ultrahuman Ring AIR has a dedicated "Workout Mode" that tracks various activities, giving you deeper insight into your overall workout metrics. By tracking heart rate during workouts, users can gain insights into their cardiovascular response, track intensity levels, and make informed decisions to improve their fitness outcomes. Stimulant window recommender: A game changer for all caffeine enthusiasts, helping you to make smart choices about your stimulant consumption. It breaks down your day into favourable times in which you can use stimulants to enhance your productivity. Circadian Phase Alignment: Geek out on various insights such as temperature minima, align your lifestyle and optimise your sleep-wake cycle for improved cognitive function, energy levels, and hormone balance. With timely, actionable nudges for sunlight exposure and movement to shift your sleep schedule earlier. Inside the AIR: Boasting a smooth inner shell and constructed with fighter jet grade titanium, Ultrahuman Ring AIR boasts a 6-day battery life, a wireless charging and water resistance up to 100 m. Available in 6 languages: The Ultrahuman App is now available in English, French, Thai, Chinese, Malay, and Indonesian. Ultrahuman Ring AIR X Ultrahuman M1: Get personalised glucose insights with the insights of the Ultrahuman Ring AIR.