Noah fabric
http://www.covercraft.com/cartlink/i...t&prod_id=ccnh
Custom car covers
http://www.covercraft.com/carcovers/...ar_covers.html
The BMW cover is very good, high reflective material that is one of the best for keeping the car cool, an excellent all around cover.
Remember your paint should be clean when putting a cover on.
In windy conditions a cover may need to be tied down, or removed.
I like covers best for their sun-protection, you can't remove a cover if there is ice or frozen precip on the cover.
If door dings are an issue, the Noah fabric may offer more protection then the BMW future cover.