MaryO, this is my first attempt to put up a picture so I doubt this will work but here is the descripton:
Fellow who did all of our canvas suggested that we do horizontal stitching across the top and it has turned out to be a good idea. There is almost no movement between the fabric and the foam inside. Not true of some that we have seen that don't have separate seams.
Yesterday we went out with friends and kept the cusions out, and were sorry. They drew the heat in and we were heeling quite a bit and they were just in the way. That said, in the evenings relaxing and in the mornings, and cruising at night, the cloth are a lifesaver.