Water proof/resistant bottom layer

[Leif135]

I have hand sewn my boys 3 or 4 big fleece liners with 2 layers of U-Haul pads underneath each. But I was wondering if anyone knew what material I could use to put on the bottom of them so that the pee does not soak all the way through.

I have seen the guineadad liners with some kind of plastic on the bottom and they can be thrown in a washing machine and dryer.

So does anyone know of a waterproof material that can be washed and dried in a machine?

[bpatters]

Wouldn't it just be easier just to put something waterproof on the bottom of the cage? Like coroplast or a shower curtain?