Garmin Index Sleep MonitorGARMIN

Ultralight armband worn on the upper arm, available in two sizes (S/M & L/XL) with a breathable, washable textile band. The central module is small and removable with lights and no buttons. Tracks sleep stages (light, deep, REM), sleep score (0–100), sleep times, resting heart rate, respiration rate, SpO₂, heart-rate variability (HRV), skin temperature and stress levels. Measures breathing variations, offering early insight into potential sleep disturbances. Utilizes skin temperature to help improve menstrual cycle tracking and ovulation estimates. Includes a smart wake alarm—gentle vibration during light sleep within a preset window.