Abstract: A bed or mattress including a plurality of springs which, or some at least of which, are movable in their axial directions so as to vary the compression of the springs or some at least of said springs, without materially or substantially changing the position of the upper surface of the bed or mattress. The bed or mattress will include a base formed as a single structure or of a plurality of sections movable independently of one another so that the compression of the springs may be varied in selected areas or in a selected area of the bed or mattress.