No later than this admit that there isn't a huge amount of information provided on the Internet on the subject of adjustable beds in general. For me, you should never buy mismatched flexible or electric adjustable mattresses meaning that you should not purchase the foundation and the mattress separately, Amerisleep information available online because adjustable or electric adjustable beds are very different from one style to another. Because an arm or electric adjustable bed is a relatively large expense you want to purchase the adjustable or simply electric adjustable bed pay attention for you. You want a bed that will fit your comfort level and your bed that you will feel good about. Mixing and matching is not really worth it for the couple of dollars that you will save. That you are better served buying the basic and mattress together because the base is built for the specific mattress that comes with the flexible or electric adjustable bed.