My first son had “flat head” and torticollis and we were told we could nip it in the bud and see a physical therapist. One of the physical therapist’s suggestions, besides doing exercises, was to purchase the head support pillow. He hated tummy time and was always on his back and she said it would help a lot. And it did. Then our second son was born and we saw the same thing happening. I used it all the time and at his six month check up his head was a lot better and there was no recommendation of physical therapy. I’m not saying that this product prevented us from getting a helmet, but with the combination of exercise, bumbo seat and sitting in carrier it really helped.