Most people experience improved sleep on a mattress that has firm support but remains comfortable. We recommend a mattress that is 7.0 to 8.5 on a firmness scale of 1 - 10. Mattresses that are too soft, especially foam mattresses, may cause back pain and discomfort. In order to find the right mattress, we recommend you test out the mattress in a mattress store or take advantage of our 100-night home trial.