Olee Sleep 11 Inch Gel Infused Pillow Top Hybrid Innerspring Mattress (Full) 11SM01F 7.5 inch Heat Treated Coil maintains mattress firmness constantly 1.5 inch Soft memory foam supports and surrounds your body shape 0.5 inch High density foam absorbs and disperse your weight. 1 inch Poly Jacquard Fabric and Hollow Conjugnated Fiber help ventilation 1 inch Eco Friendly Gel Cool I Gel help you sleep in proper temperature.