Garmin’s new sleep-tracking monitor’s armband is machine-washable. The company claims the device has a seven-night battery life. The wearable comes in two sizes: XS to S and M to XL.

Meanwhile, the Garmin tracker packs these sensors into a compact arm band that cost $169.99/£149.99. ... The cheapest Garmin watch (the Forerunner 55) retails at $149.99 /£179.99.

If you're keen on tracking your sleep without strapping a gadget onto your wrist, Garmin says its new armband is just the thing – and it's designed for all-night comfort.

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.

(Bloomberg/Samantha Murphy Kelly) — 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 ...