I hate wearing a watch to bed but want to track my sleep — the Garmin Index Sleep Monitor is the wearable I've been waiting for

Garmin Index Sleep Monitor: Review in brief

As much as I love my Garmin Forerunner 255, I don’t particularly love wearing to bed. So I was delighted to find out back in June that Garmin was releasing a specialized sleep tracker, and here it is: the first of its kind from the brand known for producing some of the best fitness and running watches on the market.

Rather than being a wrist-worn tracker, the Garmin Index Sleep Monitor is worn on your upper arm. It's a screenless sleep tracking device that sits in a machine-washable fabric armband, and is focused purely on sleep tracking and keeping tabs on your sleep stages, heart rate variability (HRV) status, blood oxygen saturation, breathing rate, skin temperature and overall sleep quality.

Although you don’t need a Garmin watch to benefi