I also have a seat protector for the bottom cushion. I also placed a large towel folded, to increase thickness, behind the child seat to increase surface area of the child seat where it would contact the seat. That way, I have about 3 inches towel covering one inch of child seat. It is tougher to streatch the leather that way. 2.5 years and still Ford quality leather.

That reminds me, I love the third row vinyl much better than the front two rows of leather. I am looking forward to replacing the fronts with quality leather.