Abstract: A foam-air mattress includes a mattress housing including a top layer and a bottom layer; a plurality of pocket walls, disposed between the top layer and the bottom layer, air bladder inserts that can be inserted into the plurality of pocket walls, wherein the air bladder inserts are configured to be connected to a pumping system via a tubing assembly; and a plurality of foam compartments formed by the mattress housing and the plurality of pocket walls, configured to accept foam inserts. The air bladder inserts when inserted into the plurality of pocket walls and inflated by the pumping system, configure the plurality of pocket walls to expand and compress foam inserts disposed within the plurality of foam compartments so as to increase the density of the foam inserts. This arrangement has applications in both the consumer and medical airbed contexts, as well as in other support system contexts, such as seat cushions for chairs.