The water-resistant backing saved me after my lab shook off half a lake in the back seat. Wiped it down with one towel and it was dry enough to load groceries. It folds up small too, so it lives in the trunk without eating space.
Muddy paws after every park trip used to mean an hour with the vacuum, but this liner wipes clean in about two minutes. It stays put on the bench seat too, no sliding around when the dog circles before lying down.