ULTRAHUMAN Ring AIR (Certified Renewed) - Smart Ring Health Tracker, Size First, Sleep Tracker, Smart Ring for Men/Women, Fitness Tracker (Sizing Kit, Sizing Kit)

Description

💍 Track your sleep, recovery & style—wear the future on your finger.

The Ultrahuman Ring AIR is the world’s lightest sleep-tracking wearable, combining advanced biometric sensors for HRV, heart rate, temperature, and movement monitoring. Engineered from space-grade titanium and tungsten carbide, it offers superior durability and scratch resistance. With water resistance up to 100 meters and a 6-day battery life, it’s designed for continuous, hassle-free wear. A custom sizing kit ensures a perfect fit, making it the ultimate minimalist smart ring for professional millennials focused on health and style.