Question: is my garmin vivoactive 3 waterproof?
Answer: The Vivoactive 3 also has 5ATM water resistance, like the latest Apple Watch, which means you can take it swimming to depths of around 50m. The Fenix 5 has even better 10ATM resistance, but unless you're planning to go snorkeling regularly, the Vivoactive's waterproofing will be fine for most situations.