This is the one
Garmin Index Sleep Monitor S/M
Current product
Â
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151,-
151,-
140,-
151,-
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
According to our heart rate sensor expert
Get extensive insights into your sleep and improve your night rest with the Garmin Index Sleep Monitor S/M. With this arm band, you know how long you're sleeping for, when you're in which sleep phase, and how you breathe while you sleep. You can see all this information in Garmin Connect app on your smartphone or tablet. This sleep tracker is recommended for an upper arm circumference of 20 to 29cm. If you have a larger circumference, go for the L/XL. Your sleep data is combined into a sleep score. This way, you know how you slept. The sleep coach gives you advice on whether you need to catch up on sleep or go to bed earlier. The Garmin Index Sleep Monitor band is lightweight and comfortable, so you'll barely feel it on your arm. The band is also machine washable. The sleep tracker lasts for a week. When the battery is empty, charge it with the included cable.
The band of this sleep tracker is recommended for an upper arm circumference of 26 to 42cm.
5 stars
0
4 stars
0
3 stars
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2 stars
2
1 star
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Almost unnoticeable during sleep
Pieter DG
2 February 2026
Automatically translated from Dutch
After a week, I'm still positive, and my main concern is sleep duration and waking up without an alarm; the vibration is strong enough to wake me up. You should take the rest of the data with a grain of salt, as that data can only be accurately determined in a sleep lab. What matters to me is the trends, primarily resting heart rate and sleep duration.
JD
5 February 2026
Automatically translated from Dutch
Coolblue takes care of everything, from taking out an insurance to repairs
For almost all accidents
More coverage in case of damage than your standard warranty
No deductible
First, add your heart rate sensor to your shopping cart. On the next page, choose the Protection Plan below. You always have a 30-day return window and pay no deductible in case of damage.
2-year Protection Plan
7,99
one-time3-year Protection Plan
12,99
one-time
Product number | 966537 | |
|---|---|---|
Manufacturer code | 010-03024-01 | |
Brand | Garmin | |
Processing of your defect | Via Coolblue | |
Old product returned for free |
Heart rate sensor detachable | ||
|---|---|---|
Standard battery type | Lithium-ion | |
Water-resistant |
Data transfer function | ||
|---|---|---|
Compatible with operating system | Android, Windows Phone, iOS | |
Bluetooth | ||
ANT+ |
Heart rate measurement under water |
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