Ring Air Aster Black Size 8

Discover the key to sleeping better. Get an everyday sleep score that shows how well you've rested. Track your sleep stages, learn what affects your sleep quality, and unlock personalized tools for better nights. Wake up refreshed and ready for anything.

• Accurate Sizing: Ultrahuman Ring sizes differ from standard; use the Sizing Kit for a perfect fit. Available in 10 sizes from 5-14.
• Advanced Sleep: Comprehensive sleep tracking including REM, Deep Sleep, Light Sleep, and Wakefulness with actionable improvement steps.
• Health Investment: Eligible for HSA/FSA, facilitating health-related investments.
• Activity Tracking: Features a Movement Index to boost non-exercise energy usage, tracking steps, workouts, and calories for all-day activity insights.
• Workout Monitoring: Dedicated Workout Mode tracks heart rate during exercise, providing insights into cardiovascular response and intensity.
• Comfortable Design: Notch-less, ultra-thin design with a smooth inner shell for unparalleled day-and-night comfort.
• Lightweight Titanium: Weighs just 2.4 grams, making it the lightest raw titanium smart ring on the market.
• Precise Performance: Monitors sleep, movement, heart rate, heart rate variability, and skin temperature with minimalist precision.