MagNTX Magnetic MaskMagNTX Magnetic Mask Great product to use Pre and Post workout and competition! MagNTX therapeutic products are constructed with 1 1 2" bi polar magnets. These products have both north and south pole fields that run in horizontal planes. The north pole helps to expand the blood vessels and increase blood flow, while the south pole promotes the removal of toxins away from surrounding tissus. Using bi polar magnets aid the body's ability to heal