Therabeads Microwave Moist Heat Pad--medibeads, Thermabeads, Therabeads, Thermalon. Any Difference?

Microwave moist heat pad--medibeads, thermabeads, therabeads, thermalon. Any difference? - therabeads

I have fibromyalgia and want to buy a lower for my back, but have no idea how to get this book. Would a permanent discharge did not rise or fall because of health problems. I use a wheelchair.