Car cover advise

I have a 1965 Mustang convertible. I’ve owned the car for 3 years now and absolutely love it. I live in Northern California with mostly mild weather. I originally bought a 3-season car cover from carcovers.com. It’s slowly disintegrated and didn’t last an entire year. They have a replacement warranty (though you pay a percentage of the total cost + shipping). The replacement cover also disintegrated overtime.

Any recommendations on a different cover for my convertible? Thanks