ByAmazon Customeron June 1, 2017
Color: Baby Blue|Verified Purchase
I bought this for my son when he was around 5 months old as the back of his head was quite flat. Almost two months later, his head has improved SO much. I wish I had taken a before & after picture. He loves to play on his activity mat & hates tummy time, so we used this whenever he was on his back (besides sleeping). I would highly recommend this product!