Which is better of the two evils?

[MyBaby'sSmile]

We bought a new bed a couple of years ago. Buying locally meant buying a stadard foam mattress. But I thought since the mattress cover would help it wouldn't be so bad.

Dh bought an expensive mattress cover. I had to have it replaced and the company exchanged it for a new one. I then realized that the mattress cover has teflon in it :

So which is better of the two evils do you think? Using the mattress cover to protect from the chemicals in the mattress, or leaving the mattress cover off, laying down a thick wool blanket as a protector and having more access to the mattress chemicals?

[MamaKye]

I don't know about chemical statistics but if a little one has an accident on the bed, which one is more likely to protect the place you'll be sleeping night after night?