I am on my 4th summer with my California cover. It is the version made for outdoor use as my car sits in the driveway all summer long (stored in a garage through the winter). It is now showing a bit of wear / thinness in a few small areas and although I probably will purchase another next year, I have been pleased with its overall performance. It quickly dries from the rain, lets the car breathe and does a pretty good job protecting the car from the crap dropping out of the trees.