Abstract: A mattress has a conventional spring core. Top and bottom insulators and padding are held in place by top and bottom cover assemblies. The cover assemblies are completely assembled before application to the core. Each cover assembly includes a horizontal panel with an annular vertical flange around its perimeter. Each flange has a hem in its free edge. Elongate rigid rods are held in the hems. Plastic wire ties on the flanges each enclose an upper rod, a lower rod and a peripheral portion of the core. When the ties are closed down to a reduced diameter, the rods and flanges are drawn together and anchored to the core. One of the cover assemblies has a loop member of a hook and loop fastener secured to the perimeter of the panel. The other cover assembly has an annular border skirt attached to the perimeter of the panel external to the flange with a binding tape covering the seam.

Abstract: A body supporting device such as mattresses, box springs, cushions and car seats having an inner coil spring structure are provided with adjustable firmness by means of a plurality of inflatable pneumatic members. The pneumatic members are positioned within the interstices formed between adjacent coil springs in a variety of patterns. The pneumatic members are connected to an inflation control device for adjusting the firmness of the body supporting device in varying modes, including a pulsation mode to provide a messaging affect.