Visco Therapy Cool Blue King MattressThe cool blue king mattress has a 13cm reflex foam and a 2cm cool blue foam combination. The cool blue foam is like memory foam but because its low visco elastic properties the material will not contour mold around the body. This is the main contribution of heat to the sleeper thus it's a cooler material. You can remove and wash the cover for hygienic purposes and rotate the model on a regular basis. [TABS] Reviews Product Sizes Sizes Single Small