What to keep in mind when looking for a good butterfly net?

Hi there, fellow nature-loving elves and gnomes of iNat.

I’m thinking of getting a reliable butterfly net, but I was wondering: what makes a butterfly net a good one? (Does it depend on the situation?) And if you have a good butterfly net yourself, what do you think makes it as useful as it is?
Also, are most nets transparent enough to take photos of insects inside or do you have tips for taking photos of caught insects without killing or cooling them?