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Ultrahuman Ring AIR Smart Ring, World's Lightest Sleep-Tracking Wearable, Space Silver, Size 14 A-Ferguson Product Id-7223352 Stay charged for up toThe Ultrahuman Ring AIR is an ultra comfortable fitness wearable that combines minimalist design with advanced health monitoring technology. Its notch less, ultra thin profile and smooth inner shell ensure exceptional comfort for continuous wear day and night. Constructed from fighter jet grade titanium, the ring is durable yet lightweight at just 2. 4 grams, making it the lightest smart ring available. It excels in sleep tracking by analyzing various