There two types cases for G3.
> One case is 30 meters waterproof.
> The other one is with open side (called Skeleton Case) which allow for charging and it is rainproof
> And because we have 90° & 170° cameras ( 90° lens is longer than 170°) so there are waterproof cases seperately for 90° and 170° cameras (cases design are the same, just the lens length is different)