Lower back ache so what matterss?

A good one: Generally it is not the mattress that will solve your back issues unless it only is occurring after you sleep on yours. Then, just a relatively firm one will do and regularly rotate it to keep it longer as they need to be replaced by 7-10 years or sooner if obese. Otherwise it is lifestyle that plays a role: regular exercise, weight control and avoiding smoking with good nutrition & sleep habits.