Whoop Strap 3.0 ProKnit - Onyx WS30
The WHOOP Strap 3.0 collects physiological data 24/7 to provide the most accurate and granular understanding of your body. It's lightweight, waterproof, and features the new and improved 5-day battery life and BLE connect.
WHOOP uses its sensors to detect changes in my heart rate, the ambient temperature, and movement patterns. Every morning, I get a detailed report telling me how much time I spent in bed, how long it took me to fall asleep, how long I spent in each stage of sleep, and how many times my sleep was disturbed.