Olee Sleep 9 Inch I-gel Multi Layered Memory Foam Matress 09FM01K Poly Imported 3.5 inch high density foam convoluted layer helps make flow to ventilate Air 2.5 inch ILD 28 density 29 Pound foam supports your body and disperse weight 1 inch Dura cool I Gel ILD help you have sound sleep non temperature sensitive 1 inch Memory Foam Mold your body shape 1 inch HD foam support your back Line