Garmin Ltd. on Wednesday launched an arm band for wear during sleep that can track vital health metrics, stepping up competition with companies like Whoop Inc. and other emerging players.

Garmin released today its new Index Sleep Monitor, a smart sleep band that gives users a closer look at their overnight vitals and recovery. In addition to tracking sleep duration and stages, the Index Sleep Monitor provides users with their overall sleep score,

The Index Sleep Monitor is designed to strap to your upper arm so you can leave your smartwatch charging overnight.