Abstract: A system to support a human body is disclosed which includes a case comprising, a top layer having a top surface and a bottom surface and a bottom layer having an inner top surface and an outer bottom surface, a plurality of particles filling the space between the top and bottom layers within the case, a fluid dispense system coupled to the case and adapted to move a working fluid between the plurality of particles, at least one pressure sensor coupled to the case and adapted to provide a signal corresponding to a load placed thereon, and a controller adapted to continually receive the signal from the at least one pressure sensor, actuate the fluid dispensing system for a predetermined amount of time, in response to a change in the signal from the at least one pressure sensor, and receive input from a user control panel.