Waterproof Seat Covers

[scimmiamagia!]

What waterproof seat covers are you using? I have a set from VW, which have been ok, but they are getting old and the lining is disintegrating leaving a dust on the seats.

I need waterproof covers as the van get used for transporting wet kids.

I think that rules out Brandrup?

I should add that I have a Beach with the three seat rear bench.