ULTRAHUMAN Ultrahuman Ring AIR - World’s lightest Sleep-Tracking Wearable, HRV & Temp Monitoring, Track Sleep, Movement & Recovery, Water Resistant, 6 Days Battery Life with Lifetime Free Subscription (Size 8)

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.