I CANNOT BEGIN TO TELL YOU HOW MUCH THIS PILLOW WORKS. I initially bought it to prevent my newborn from having flat head syndrome. I noticed that as he grew from a few weeks old to now 2 months, he just gets crankier and crankier. I never knew why, but EVER SINCE I'VE MADE HIM SLEEP WITH THIS PILLOW, HE DID A FULL COMPLETE 360! He went back to being the calm baby boy he was when he was days / weeks old. He sleeps 101% more comfortably. I'm actually going to stock up on these from now on. Already buying my 2nd one now, just in case, even if I just received this pillow 2 days ago :p happy baby, happy LIFE!