I orded two vinyl, zipped queen mattress covers on Amazon for a total of $25 (from Shop Bedding). This was a little more than the cost of the plastic ones, but from what I read would last longer and was less likely to tear. I looked for covers that claimed to block allergens, under the theory that they'd block my mattresses from mildew. We will see.

And now the questions. There are a number of 100% wax solutions, DIY and premade. But, will wax leave the fabric to stiff? And how long would it take to wax two big futons??? Nikwax offers a non-fluorpolymer spray, but how many buckets of that will I need? A friend suggested just using fitted sheets and pulling off when it rains, but it seems a shame to not use the covers which of course will fit perfectly and look much more put together. Ok, back to the blogosphere to look for a solution.