[McheleM]

I do this, but I use PUL as the back/bottom layer. It's the material that cloth diaper covers are made from, and holds up to washing better than vinyl. Also,your edging needs to be something non absorbent or waterproof, or the urine will essentially wick through and cause your floor to get wet. I wrap my PUL around and use it as a binding then toss them in the dryer on high heat to seal any holes the needle makes in the PUL

And I don't prewash my fabrics. I never have.

If you're prewashing before cutting, why do you need to prewash again before letting the dog use it? Seems like a bunch of extra washing, and wasting of water and soap (and time) which kind of defeats the purpose of reusable items...