Memory Foam Mattress Topper with Cooling Technology: Enjoy the benefits of memory foam without sacrificing a cool sleep experience. This 3-inch gel memory foam mattress top is infused with advanced cooling technology to dissipate heat and regulate your body temperature throughout the night. Indulge in the perfect blend of support and coolness for a rejuvenating sleep each night. The advantage of a gel memory foam mattress is that it has a good thermostat effect. When used in summer, it will not feel too hot. It can absorb body heat into the gel mattress and then emit it through vent holes for cooling. The temperature of the mattress can be kept below the human body temperature, which is the optimum temperature for human comfort.​