For me there isn't.
I have a neck that surgeons wanted to operate on.
I wouldn't do it. I have tried many pillows of all kinds. one costing almost 200.00.
My Pillow is the only one that has help stop pain in my neck completely. It took a couple months to be relieved of pain but I felt it the first night using it. I will never have any other pillows that these. The best and most helpful for my pain in the neck.