HUGO dual mat system. The two mats together provide an amplified field. But the main benefit of using the dual mats together, is lying in-between them. Your body basically becomes the filling in a PEMF “sandwich”.
This is because when you use just one mat, the field is strongest at the mat and loses strength as is passes through your body, which means that the side of your body that is not in contact with the mat is exposed to a weaker field. Whereas lying in-between two mats means that the full strength of the magnetic field can penetrate the body equally from both sides, at the same time.