ULTRAHUMAN Ring AIR – Sleep and Fitness Tracker, Smart Ring for Men and Women, No app fee for standard features, Up to 6 days battery life (Size 14)

The Ultrahuman Ring Air's ultra-light design feels so natural, you'll hardly notice you're wearing it. So, you can go about your day and sleep soundly at night, all while it does its thing. Your daily sleep score shows you how well you've rested. You can track your sleep stages, see what's getting in the way of your shuteye, and unlock personalised tools for a better night's rest. Dynamic Recovery keeps an eye on key indicators like sleep, stress, skin temperature, and HRV. So, you can make time f...