Well I really tried to make this work in my car. I had to cut the wings off since my car seat already had flared sides. That helped a little but I still had back aches. I tried trimming the back and making angles to contour to my car seat. That did not work either. So now I have a piece of cut up insert that cost me $15.00 that I will have to throw away. I really tried to make it work but it just would not fit right in my car no matter how I tried to modify it.