Alan This was the first sleep positioner that we used with the boys. They didn't seem to mind it, but they did slide down a bit (since it's on an angle). We used it for about a month before going to a different one. It was good, but once they got to be above about 10 lbs, it seemed too small.
Keywords: sleep positioner, sleep, flat head Updated on: 12/21/2009 - 5:08pm