Getting relief from headaches, low-back pain and muscle soreness is easy with Pressure Point Therapy Packes. These packs use a unique combination of pressure point therapy and hot/cold therapy to help relieve your headaches and pain. Cross-linked therapy balls, encased in hot/cold therapy gel, are ergonomically positioned to fit pressure points at the base of the skull or lower back. Packs can be cooled to help with headaches or warmed to help with muscle soreness. The Dual Comfort cover offers both slow-release and rapid release treatment surfaces. The hot/cold gel is non-toxic and biodegradable. Store the packs in the freezer for convenience. Heat in the microwave.