The new hi tech way to keep cool that costs nothing to run this soft touch pillow pad is filled with a harmless gel that always remains 4c below your body temperature delivering an amazing cooling effect the cooling process is automatically activated every time you move and is a lovely dry coolness not wet or sweaty you dont need to refrigerate or freeze the pad first unless you want to be really icy cool great for hot head headaches hot feet hot flushes sunburn or just to coo