concentration at the top the buoyant pads 56 and 58 float within just below and in contact with the upper panel of the envelope 52 the generally random partially intertwined or interbonded structure formed by the polyester fibers and cured binder greatly dampen wave motion in the volume of water adjacent the occupant of the waterbed without the necessity of filling substantially the entire envelope 52 with costly fiber there is also a tendency to inhibit the formation of wave action likewise by virtue of the buoyant position of the pads at the top of the water column as previously mentioned the buoyant pads have an advantageous tendency to distribute body impact across the top of the mattress without conduction to the the water mass it is preferable that the two pads be only slightly buoyant especially the lower pad 58 if pad 58 is highly buoyant it has a tendency to compress the upper pad 56 thereby reducing the loft of the pad and reducing the wave motion suppressing qualities unlike prior art buoyant pads in the form of continuous sheets of foam material my spaced apart foam beads permit free passage of convection currents through my entire buoyant fiber structure accordingly odor reduction is achieved while the structures provided by my invention can.