Sorry, have I lost the plot with my understanding of what a Bimini Top is and what it should do?

I have an: 1. Open top car.
I have 2. A car with a hood

What do I need another "top" for? Some of these don't even look shower proof?

Thanks Mark

Honesty means doing it right, even when no one is looking!

2004 Roadster S1 3.0 V6 gone!

Mark