$99.99 (as of October 19, 2018, 10:40 am) & FREE Shipping. Details
SWIM HEART RATE1 – Stores up to 20 hours of heart rate data during swims, then forwards it to a compatible device at the end of the session. It also sends real-time heart rate and interval summaries to the watch.
NON-SLIP DESIGN – Keeps the monitor in place, even during push-offs from pool walls.
COMPACT and DURABLE – Creates minimal drag through the water. HRM-Swim is the smallest and lightest heart rate monitor from Garmin. Withstands repeated exposure to all swim environments, including pools, salt water and fresh water