The mattress on this bed uses a very deep and robust pocket sprung unit with 1200 individual springs to generate the high levels of support it offers, and the top of the mattress hosts another deep layer of quilting that is tufted to ensure that comfort gets distributed around the bed evenly. This bed can support not just one heavy person, but two comfortably. The support it gives will ensure that even if two heavy adults sleep in the bed, each will have a comfortable night's sleep unaware of the other even if they are both restless.