Fiberglass insulation that doesn't stay wet or attract mice?

profdant139 wrote:
I'm still getting ready to enclose the underbelly -- a daunting project. I'm using an inch of EPS stryrofoam board, covered underneath with coroplast. I'd rather use 2 inch board, but do not have enough clearance under my water tank.

So I would like to supplement the foam board with some fiberglass batting type of material, stuffed into all of the empty space (especially around the water tank).

But the problem, of course, is that if and when that stuff gets wet, it stays wet. And mice love to nest in it --why not? (I guess they don't get itchy from it, like I do??)

So is there any other similar product that I am overlooking -- something soft and "stuffable," but which does not retain moisture or attract mice?

Thanks in advance for your suggestions!