Small waterproof blanket

[Mamamia35]

I need a blanket that has a waterproof side for a dick cat who intermittently pees on my very small sofa. Does anybody know where I could get such a thing? About a metre wide.

Take a look at outdoor clothing shops and argos.

Search for waterproof picnic blanket

I have a SilentNight pet blanket that's waterproof. Think I got it from Argos. Does the job and it's snuggly enough for the dog!

Thanks all.
I’ve looked at picnic blankets but they are too big.