All Foam 5" Deep Orthopaedic Reflex Foam Stress Free MattressThis mattress all foam mattress does not contain any springs providing the sleeper with a firmer feel. With a 5 inch deep base approximately 12. 5cm, designed with an open cell reflex foam, which is made up of thousands of air bubbles which expand and contract when the sleeper lays on the mattress. This reflex foam provides both body moulding and bounce back properties which offers a firm yet hugely comfortable sleeping experience whilst the foam