Different sleeping positions
require different pillow heights

if you sleep on your side, you need about 3.5 inches of support under your head, and about 4.5 inches under your neck. But sleeping on your back, you need only 2.5 inches of support under your head, and about 3.5 inches under your neck



Morover everyone like changing their position automatically all night, traditional pillows don't work because they cannot be ADJUSTED