The Garmin Index™ Sleep Monitor is an innovative upper-arm sleep tracking band that delivers deep rest insights without wearing a watch. Lightweight and breathable, the band holds a small removable module that records vital sleep data overnight. The module monitors sleep stages (light, deep, REM), resting heart rate, HRV status, respiration, skin temperature, stress indicators, and provides a personalized sleep score each morning.

Ideal for users who prefer not to wear a smartwatch while sleeping, the Index Sleep Monitor syncs automatically via Bluetooth to the Garmin Connect app. It supports indoor/outdoor sleep trends, women’s health cycle analysis, smart alarm features, and Body Battery recovery tracking over multiple nights. With up to seven nights of battery life and a machine‑washable textile band, it combines comfort with advanced monitoring.

Available in two ergonomic sizes (S–M and L–XL) to fit different arm circumferences.

S - M: Fits upper-arm circumferences of 20-29cm
L - XL: Fits upper-arm circumferences of 26-42cm

Garmin - Index™ Sleep Monitor