I have been diagnosed with Fibromyalgia and have tried Protac Ball Blanket^® Flexible. I use it when my body feels like it is about to fall apart from pain. It is good to have it draped over me, because it feels like my body is being held together. My muscles get warm, and it feels relaxing. I also use it on the floor where I roll into it or use it as a mattress. When I sit in a chair, I wrap the blanket around me, providing a good reading position, as I then can rest my arms on the blanket.