Patent ID: 7469436

Claim:
A patient support surface, comprising: a cover defining an interior region, the cover including a top surface and a bottom surface; a first layer of a three-dimensional material positioned in the interior region, the three-dimensional material comprising a network of thermoplastic fibers, the network comprising a plurality of spaced-apart dome-shaped projections, the dome-shaped projections projecting upwardly toward the top surface of the cover; a second layer of the three-dimensional fiber material positioned in the interior region below the first layer, the dome-shaped projections of the second layer projecting downwardly away from the first layer toward the bottom surface of the cover; the first layer and second layer being configured to reduce shear forces on a patient positioned on the patient support surface; a plurality of vertical can bladders positioned in the interior region below the second layer; and a non-rigid base located below the vertical can bladders in the interior region.