Sleep monitors are devices designed to track and analyze sleep patterns. They can be worn as wristbands, placed under mattresses, or integrated into smart home systems. These monitors typically measure factors such as heart rate, movement, and breathing to provide insights into the quality and duration of sleep. Many sleep monitors connect to smartphones or computers, allowing users to view their sleep data over time. Some models also offer features like sleep coaching or relaxation techniques to help improve sleep quality. Popular brands include Fitbit, Garmin, and Withings, each offering various functionalities to cater to different needs.