I have a $60 "CoverMax" brand cover. After one year, it leaks rain, so I'm now using a 4 X 8 $5 poly tarp and bungees. The bad news is, for 6 months out of that year, the cover was in my cellar, rolled up on the shelf so as not to cause crinks due to folding. Maybe that's normal wear. I don't know. I like Steve's idea better then the $5 poly tarp though. For $20, you could get another as needed.
