The Chillow Comfort Device is a soft, medical-grade, non-electric, thermo-regulating cushion that continually absorbs body heat and discharges it back to the surrounding environment, thus producing a cooling effect. Once activated (by just adding water), its main application is as a pillow case insert to keep the pillow cool; but it can also provide a measure of comfort/relief for headaches, hot flashes, tired feet, injury treatment, sunburns, etc.