Track your workout data even while you’re underwater with the Garmin HRM-Swim Monitor. Designed just for swimmers, this device securely straps around your chest to track and monitor your heart rate as you swim. Storing the data while you’re underwater, the HRM-Swim wirelessly syncs the information once you’re done to your Garmin Epix, Fenix 3, or Forerunner 920XT device. Compact and ultra lightweight, the HRM-Swim has a seamless design and carefully crafted technology to create the least amount of drag possible to keep your times accurate. The HRM-Swim has a replaceable battery that will last you an incredible 18 months and it is able to store up to 20 hours of heart rate monitoring before it needs to be synced.