I'm sure there will be people who disagree with this sentiment, but if you're using your car regularly, we think you're better off leaving it uncovered. If your car is getting covered in rain and debris and all sorts of muck, and then you put a cover on top of it, it's not exactly going to do your paintwork any favours. You can opt for something called a Carcoon, but it's expensive: www.carcoon.com/