I placed 1 seat cover on the X1/9 seat 💺, it fit well. The seat cover are nylon spun plastic, the coloring is excellent. My problem is that the fabric although well made is not backed and blocked with 1/4" of foam. Car seats are often contoured, as such just stretching a fabric cover over them leaved the new seat cover billowy, it does not conform to the seat. At the car show where I tested it out with the judges...they said it cheapened the car as it was not an upholstered application. I think i will remove them and bring them to a seamstress to sew some blocking foam so the better conform to my seats. Now don't read this wrong, they are very nice and a value...just billowy as they are thin fabric covers.