the big question is why do you need a waterproof case for the gopro hero 7 black
while it's already waterproof? well for once if you really want to take action video and put the camera in harm's way
using this very exspansicve gopro 7 than you like to have some armor to protect the camera
so the gopro will survive but i will be using it underwater salty water because i live right next door to the ocean
where i want some extra protection for all the electronics because saltwater is like battery acid for electronics