ULTRAHUMAN Ring AIR - No App Subscription - Smart Ring - Size First with Size Kit - Track Sleep, Workouts, Heart Rate, HRV - Up to 6 Days Battery Life (Size 14)

Size first before purchase: ultra-human ring sizes are different from standard ring sizes. Buy a ring size set first, wear it overnight and buy the perfect ring air size for you. Ring Air is available in 10 sizes from 5-14.

Sleep index - Ring Air has been derived to help you understand the different sleep phases such as deep sleep, REM sleep, light sleep and wakefulness, and helps you understand the different metabolic processes of the body that occur for growth, repair, recovery and maintenance. It is intelligently designed to be your only sleep health metric, and evaluates your total sleep time, resting heart rate and rest to create a comprehensive picture of your sleep quality.

Movement index – with the right nudges and biofeedback, it helps you stay active and optimise for better cardiovascular function. Ring AIR is designed to help you move more often, and also helps you track your steps, calories and workouts.

Recovery score: Get insights into different recovery signals that your body sends throughout the day to allow a deeper understanding of its needs. It is derived from a mix of key metrics, including heart rate variability (HRV) and skin temperature, which interpret your body's signals and allow you to monitor your overall well-being.

Training tracking: the Ultrahuman Ring Air has a special "workout mode" that records different activities and gives you a deeper insight into your entire training metrics. By recording heart rate during exercise, you can gain insights into your cardiovascular response, track intensity and make informed decisions to improve your fitness results.

Recommendation for stimulating windows – This feature is a game changer for all caffeine enthusiasts and helps you make smarter decisions about your stimulant consumption. Divide your day into favorable times when you can consume stimulants to increase your productivity.

Alignment of the circadian phase – find out about various findings, such as temperature minimization, adjust your lifestyle and optimise your sleep-wake rhythm to improve cognitive function, energy levels and hormone balance, with timely, actionable impulses for sunlight and exercise to shift your sleep rhythm sooner.

Women's health – Ring Air has state-of-the-art features tailored to women's health and provide personalised insights into each phase of the menstrual cycle by correlating them with different biomarkers. In addition, it provides pregnancy insights for expectant mothers that allow them to seamlessly track the correlation of their biomarkers with trimester course through individually tailored scores.