1. Magnetic particles release energy. 2. Improved sleep quality. 3. Enhance the function of immune system, strengthen the body resistance. 4. Improve the body's oxygen content, supplement the body's mineral elements.
You may laugh but magnetic mattresses or mattress toppers are not as unusual as you might imagine. As for the science, I really don't know but magnetic underwear is a step too far. At least I know how the phrase "babe magnet" came about