One Full-size CeraMAT. 

EMF is a type of energy produced whenever there is an electric current.  It is reportedly harmful to the body and has created worldwide alarm because it is the 4th leading environment pollutant.

CeraMAT's 3-Layer Heating wire blocks EMF at its origin.  Most generic heating pads or electric blankets are comprised of single electrical wires which emit EMF.  The patented 3-layer heating wire allows the electrical currents to flow in opposite directions to minimize EMF production.