I have used tie ‘cooling pillow’ for several nights now- do to the plastic over the gel layer, I have awakened in a pool of sweat every morning! ‘Cooling’ effect lasts maybe 1 minute- then the gel heats up! Even with cotton 2 pillowslips over it, same result. VERY inaccurate advertising and a total waste of over $100; of course no returns for ‘sanitary reasons’- total rip-off, and False Advertising!