Rest in comfort every night with the 4" Cool GelLux Foam Mattress Topper by Henredon. Topper features a liquid, gel-infused foam that provides a cooler sleep surface. Patented GelLux technology combines the benefits of cooling gel with a responsive foam. The Tri-Zone wave and coil sculpted design promotes air flow and support where your body needs it most. 5 Year Limited Warranty.