the nanoparticles may be of a generally round shape forming nanospheres in another embodiment shown in fig2 the nanoparticles are graphine nanoplatelets 20 in one embodiment the nanoparticles have a size range from about 1 to 20 nanometers thick and about 1 to 50 microns wide the nanoparticles and in one particular embodiment of nanoplatelets may be provided in a weight fraction range of up to 20 in another embodiment the nanoplatelets may be in a weight fraction range from about 1 10 in yet another embodiment the weight fraction range may be about 4 6 the nanoparticles may be mixed into the base fluid by stirring or shaking in order to provide a generally homogenous and even dispersion the even dispersion of nanoparticles in the base fluid facilitates a more even heat transfer over the surface area of the seat pads 14 and 16 the more even heat transfer provides an improved perception of comfort and cooling to the seated user experimental data has verified the effect of improved thermal conductivity with the addition of graphine nanoparticles three samples each of the base fluid and the nanoparticle enhanced fluid were subjected to testing and measurement of thermal properties the base fluid and the nanoparticle enhanced base fluid both contained microspheres or micro balloons which are added to reduce the fluid density and increase the fluid viscosity thermal conductivity of the samples were measured using a modified transient plane source sensor placed in contact with each of the specimens the thermal conductivity was measured at a test temperature of approximately 23 degrees c test samples for the base fluid without nanoplatelets yielded thermal conductivity measurements of 0 087 w m k 0 086 w m k and 0 085 w m k.