After much deliberation I bought the pillow for my son, because he got a very flat rear head. Now for 4 weeks he is almost every nap (in stroller) on his head and form has improved significantly. This was even confirmed to me by people who were not aware of the pillow. But now he turns not yet selbststängig from back to stomach if he can do that, I'll just have to use the pillow on the day, because I have so better control, as it lies. I think the prone position for sleeping is not possible with the pillow and man receives not always with the same, if the night might turn the baby itself. However, there is one thing I have to notice when the baby puts his head on one side, it often pushes the ear to work with. I mean, kids are prone to protruding ears, this will get in the pillow rather too ?!