Zenergy Cervical Pillow is a firm cervical roll that provides the therapeutic benefits of far infrared heat and negative ions for pain relief, deep relaxation and stress/headache relief Contains the energy balancing Chakra gemstones of the !st, 2nd and 3rd Chakras: clear quartz, amethyst and lapis lazuli. May also be placed behind low back or under knees as needed. Included with Zenergy Medium Mat Bundle..