Garmin - Index Sleep Monitor Size: S/M - Black - (2025)

How did you sleep? Find out with the Index Sleep Monitor. Comfortable, lightweight and worn on the upper arm, this smart sleep band can capture sleep-tracking and recovery metrics — including sleep score, sleep stages and HRV status — so you can better understand how your body recovers each night (data presented is intended to be a close estimation of metrics tracked). Using skin temperature, advanced women’s health tracking can provide more insight into your menstrual cycle , including better period predictions and past ovulation estimates (this feature is not intended to support conception, contraception or birth control and is not a medical device). If you wear a compatible Garmin smartwatch during the day, your data will seamlessly sync via the Garmin Connect app for more insight into your health and fitness. Plus, get up to 7 nights of battery life.

Extend your prime for years to come with WHOOP—the only wearable that turns comprehensive health insights into daily action. There’s a WHOOP membership for every goal. On WHOOP Peak, get health and longevity insights to help you perform at your peak for longer. With 24/7 data collection and 14+ days of battery life, WHOOP continuously monitors your metrics, then customizes coaching based on your unique physiology. Quantify the impact of 160+ behaviors, monitor your key vitals, pinpoint your stressors, and slow your Pace of Aging with Healthspan.* Align your daily habits with your long-term health goals on WHOOP Peak.

Improve your health and fitness like never before with WHOOP—the only wearable that turns comprehensive health insights into daily action. There’s a WHOOP membership for every goal. On WHOOP One, maximize your performance with personalized sleep, strain, and recovery guidance. With 24/7 data collection and 14+ days of battery life, WHOOP continuously monitors your metrics, then customizes coaching based on your unique physiology. Quantify the impact of 160+ behaviors, chase personalized targets with VO2 max, and calculate the muscular load of your workouts by tracking weights, reps, and sets. Build a routine that helps you perform at your best on WHOOP One.