Memory Foam Mattresses: The Sofa Bed Detail That Makes All the Difference

The comfort of a sofa bed is decided almost entirely by its mattress, and memory foam is the detail that changes the experience most. Because a sofa bed sleeping surface is thinner than a conventional mattress, pressure builds quickly at the hips and shoulders, and memory foam is particularly good at spreading that load rather than resisting it. In this guide we explain how viscoelastic foam behaves, why depth matters more than any other specification, and how density should be matched to how often the bed is actually used. We also look at base types and slat spacing, temperature and airflow, the compromise between sitting and sleeping comfort on fold flat designs, and simple maintenance habits that keep foam performing for years rather than months. There is also advice on hybrid constructions, who gains most from pressure relief, and what to expect during the first few nights on new foam....