Garmin wearables are usually some of the most comprehensive around when it comes to features, and the Index Sleep Monitor is no different. There are a total of nine different metrics tracked by the armband.

Garmin's latest wearable is the Index Sleep Monitor, a band for overnight sleep tracking that means you don't need to wear a watch in bed.

Garmin unveils new Index Sleep Monitor, a lightweight sleep tracking armband with a week-long battery and illness-predicting tech