Ultrahuman Ring AIR Smart Ring - Size 13 - Aster Black

World’s most comfortable wearable

Glides with you through your day, feeling lighter than air. It’s there when you need it, and invisible when you don’t.

Form factor so discreet, it’s easy to forget you’re wearing it but hard to ignore its capabilities.

Wake up to your sleep insights
The Sleep Index, intelligently designed to be your sole metric for sleep health, assesses your total sleep duration, resting heart rate, and restfulness, creating a comprehensive picture of your sleep quality.

Temperature tracking made easy
Skin temperature is vital for measuring your body's physiological states and responses to various factors, including exercise, stress, and illness.

Listen to your body clock
The Phase Response Curve (PRC) describes the intricate interplay between a stimulus, such as light exposure, food or exercise mapped to a shift in your body's circadian rhythm.

Here’s to a more active you
The Movement Index is designed to keep you moving for optimum glucose metabolism and to increase your non-exercise energy usage.

Maximize recovery with key HRV insights
The correlation between HRV and recovery is pivotal to understanding the body's recuperative capabilities and its readiness to take on another day.

The only nudges that you need
Personalized nudges for a healthier you. Get tailor-made insights and alerts to help you make better choices in real time.