8 inch memory foam mattress: 2 inches memory foam over 6 inches of high density support foam * Firm memory foam mattress. Ideal for relief of back pain. * Ships compressed for easy delviery and set up. Fit into small bedrooms with ease. * Memory foam conforms to body, aligning neck and spine creating optimal sleep environment. * Foam is CertipurUS Certified, free of any harmful materials. 25 year warranty.