Patent ID: 7886388

Claim:
A mattress, comprising: a first foam layer having a plurality of projections with substantially flat tops separated by gaps therebetween wherein the substantially flat tops define a top surface of said first foam layer, which top surface is a body-supporting surface of said mattress, said first foam layer further defining a bottom surface; a second foam layer defining a length and a width and a thickness and having a continuous horizontal flat top surface extending completely along the length and the width and having a bottom surface and oriented with its top surface in contact with the bottom surface of the first foam layer, wherein said second foam layer defines at least two regions of the bottom surface from which foam material has been extracted to define multiple open cavities separated by inter-connected foam walls, and at least a portion of the multiple open cavities each define in cross-section a geometric shape selected from the group consisting of: circular, oval, hexagonal, octagonal, square, triangular and diamond, and said second foam layer defines at least one region across the width of the bottom surface from which foam material has not been extracted leaving said at least one region of the bottom surface substantially flat; and a third foam layer defining a top surface and a bottom surface and oriented with its top surface in contact with the bottom surface of the second foam layer.