Specific Wet Okole will fit as well as Badger Coachworks, Land Rover branded covers, and some others that are escaping me at the moment. They should all have clips, straps, zippers, and ties to secure them around your seat bases and seat backs, although I've only used the Wet Okoles and Badgers. I don't know if Wet Okole makes jump seat ones.
I love my black Badger covers, but I've had a dog with white hair in the car on a few occasions, and the black is not the best color option for that.
Some pics of my Wet Okoles and Badgers to show fit if you scroll down this page.
bjf just installed a different color Badger on his seats that are better suited for a dog I'd think, just because it would mask some of the hair a little better.