I have a very bad lower back problem that has been ongoing for several years with surgeries etc... I have always needed a body pillow to throw my leg over to keep my spine aligned while sleeping on my side. Every other pillow I have tried has been fine at first but lost it's shape and height. This pillow is 6 inches thick, it stays put and my spine is aligned and very happy. That means I can sleep at night. It really makes a big difference in my pain level. When you get this, make sure you let it out of the package to reshape. It is heavy and not something you can lug around the house but that is what I wanted. I was waking up sore every morning with the other pillow I purchased for twice as much. I make sure that I fluff it up every mornign while making my bed, it will keep it's shape for a long time to come.