Garmin Index Sleep Monitor ZDNET's key takeaways The Garmin Index Sleep Monitor is available for $170 in S/M and L/XL sizes.
The band is very comfortable and lightweight, the monitor tracks up to seven nights of sleep, and the sleep/recovery metrics are well integrated into the Garmin Connect ecosystem.
It's still fairly expensive for a single-purpose wearable, even though FSA/HSA coverage is supported. $169.99 at Amazon $169.99 at Crutchfield more buying choices
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As a regular reader of my work, you likely know I'm a fan of Garmin watches, especially for the built-in LED flashlight I use daily.
I've been hoping for a smart ring that could sync with Garmin Connect, allowing me to gather key metrics for recovery and training status without wearing a bulky watch to bed. While a smart ring isn't yet an option, Garmin has introduced a single-purpose wearable to fill the void: the Index Sleep Monitor.
Also: The best Garmin watches you can buy: Expert tested
The Index Sleep Monitor is designed to track a week of sleep and integrate that data into your Garmin Connect ecosystem and smartwatch. While you can use the monitor without a Garmin watch, you'll be limited to viewing sleep details in the smartphone app.
The system consists of an ultra-comfortable band that measures 2.5 inches wide. Two varying lengths are available, depending on your upper arm circumference. The L/XL size fits my arm the best, but there is also an S/M size available.
Also: The best smart rings of 2025: I tested and found an obvious winner
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