Garmin Index™ Sleep Monitor – HRV, Sleep Stages & Body Recovery Armband

Track sleep stages, HRV, and recovery with the Garmin Index Sleep Monitor. A soft armband built for overnight comfort and advanced sleep insights. Available Sizes (in inches) Max Length: 12.83L × 2.52H × 0.024W inches (Small / Medium) 17.80L × 2.52H × 0.024W inches  (Large / XL)   Features: Advanced Sleep Tracking – Monitors light, deep, and REM sleep stages with high accuracy. Heart Rate Variability (HRV) – Tracks overnight HRV trends to assess stress and recovery. Pulse Ox (SpO₂) – Measures blood oxygen levels and breathing patterns while sleeping. Skin Temperature Sensor – Detects changes in skin temperature to help track wellness patterns. Body Battery™ Recovery – Monitors how your body recharges overnight for better daily energy insights. Smart Wake Alarm – Gently wakes you during a light sleep phase using vibration. 7-Night Battery Life – Long-lasting battery designed for a full week of overnight tracking. Comfortable Upper Arm Fit – Soft, breathable armband built