polyurethane and visco-elastic (memory foam)'. The key thing to remember is that an all-foam mattress doesn't have springs. 'An all-foam mattress is usually one of the most affordable mattress ...

Most memory foam mattresses have three layers of foam ... In the middle is a 5cm layer of soft visco memory foam that’s aimed at tackling pressure relief, and on top of that is a 4cm breathable ...