Garmin Index Sleep Monitor - S/M

Manufacturer's Website

Description

Introducing the Garmin Index Sleep Monitor - S/M. A dedicated overnight health and recovery tracking device designed specifically for users who prefer a lighter, more compact upper-arm fit. Worn on the upper arm using a soft, breathable strap made from a 70% nylon and 30% spandex blend, it provides a comfortable, unobtrusive experience throughout the night. The S/M version is tailored for smaller arm circumferences, ensuring a secure fit while maintaining flexibility and airflow to minimise discomfort during sleep.

Inside the compact sensor module, the device integrates advanced biometric tracking technology that continuously records key physiological signals while you sleep. These include heart rate, respiration rate, blood oxygen saturation via Pulse Ox, and movement through an embedded accelerometer. This combination allows the device to generate detailed insights into sleep stages, sleep quality, and overnight recovery patterns, helping users understand how effectively their body restores energy during rest. A standout feature of the Garmin Index Sleep Monitor is its ability to measure skin temperature trends throughout the night, which can contribute to deeper wellness analysis such as cycle tracking and ovulation estimation through the Garmin Connect ecosystem. It also monitors breathing variations during sleep, offering additional context about sleep stability and potential disturbances. Combined with Body Battery energy tracking, these metrics provide a comprehensive picture of how sleep impacts daily readiness and overall wellbeing.

The device is designed for extended convenience, offering up to 7 nights of battery life on a single charge, even with continuous overnight oxygen tracking enabled. It connects via Bluetooth Low Energy to both Android and iOS devices, syncing seamlessly with Garmin Connect to present sleep scores, recovery insights, and long-term health trends. Charging is handled through Garmins proprietary charging system, ensuring a simple and consistent recharging experience between uses. Practicality is a key strength of the S/M version, with a fully machine-washable band that makes long-term hygiene maintenance easy and stress-free. The lightweight module and slim-profile band reduce sleep interference, making it suitable for users who want accurate health tracking without wearing a smartwatch overnight.

Features

• Soft, stretchy, breathable
• Mix. 70% nylon, 30% spandex strap
• 326 x 63.5 x 0.55 mm (12.8 x 2.5 x 0.02) in size
• Lithium ion battery
• Comfortable, breathable design worn on the upper arm
• Up to 7 nights of battery life
• Sleep tracking and recovery metrics
• Breathing variations throughout the night
• Skin temperature tracking for past ovulation estimates and more
• Machine-washable band for easy cleaning

Specifications

Package Contents

• 1x Garmin Index Sleep Monitor - S/M
• 1x Charging/data cable
• 1x Documentation