12-inch memory foam mattress with exclusive 3-layer construction * Three layers of premium foam; top comfort layer 1-inch of extra-soft premium memory foam; middle support layer 2-1/2-inch of premium memory foam treated with surefresh for lasting freshness; bottom core layer 8-1/2-inch of premium base foam for stability * Relieves painful pressure points and reduces motion transfer so that you can sleep undisturbed; superior breathability for a comfortably cool sleeping temperature; therapeutic support level- medium * After unpacking, allow up to 72 hours for mattress to fully expand; Spot clean only * Mattress measures 80-inch long by 60-inch wide by 12-inch high