Buster3,
I have found over the years of buying tarps, that the blue ones just aren't worth it, not only does that Blue color stand out like a fart in church, the just don't hold up to the weather.
The blue ones are by far the least expensive to buy, but I have gone to using the silver ones, they are just a few dollars more, but are a much better quality tarp. I usually order mine through Harbor Freight and Tools, several differant sizes at a time. I kinda stocked up a year or so ago when they had them on a 50% off sale.
My JD 950 was kept covered with one all winter and still is, for I have no other place to keep it.