This is interesting. I've bought PoochPads in the past, years ago. They were OK. I still have one. They're washable dog underpads. Now they've got beds with a fiberfill insert and zip-off PoochPad covers to throw in the washer. I would be very curious how well they work. If the dog was lying on it for several hours, would the hip stay dry? It says "PoochPad® Dog Beds keep pooches comfortable and bone dry...even if they have an “accident” while on the bed." If it really works that well and can prevent a urine burn, it would be money well spent. They're not cheap. The small bed is $75 and the cover alone, sold separately, is $73, and you'd want several. But maybe they might be an answer for someone. At least they're interesting.
They also have kennel mats with zip-off covers, which you could use for a bed.
PoochPad Ultra Dry Bed
Re: PoochPad Ultra Dry Bed
That's expensive! I have to agree it's an interesting product.