Amazon.com: Garmin 010-01995-10 Vivosmart 4, Activity and Fitness Tracker w/ Pulse Ox and Heart Rate Monitor, Black : Electronics
010-02441-12, Garmin MIP, 112 x 112, 5 ATM Waterproof, 14.11 x 14.11 mm, White | EET
Amazon.com: Garmin vivofit jr. 3, Fitness Tracker for Kids, Includes Interactive App Experience, Swim-Friendly, Up To 1-year Battery Life, Blue Stars : Sports & Outdoors
Best waterproof fitness trackers: Swim with your tracker in 2022 | Mashable