Patent ID: 7469437

Claim:
A support cushion, comprising: a top surface; a bottom surface opposite the top surface and separated from the top surface by a distance defining a thickness of the support cushion; a layer of flexible foam having a plurality of cells defining a reticulated cellular structure, the cells of the reticulated cellular structure comprising a skeletal plurality of supports through which substantially open cell walls establish fluid communication between an interior of the cell and interiors of adjacent cells, the layer of flexible foam having a density no less than about 30 kg/m 3 and no greater than about 175 kg/m 3 , and a hardness of no less than about 20 N and no greater than about 150 N at 40% indentation force deflection measured at about 22 degrees Celsius, the layer of flexible foam comprising visco-elastic foam having at least one material property responsive to a temperature change in a range of 10-30° C.; and a layer of polyurethane foam located beneath the layer of flexible foam, the layer of polyurethane foam having a hardness of at least about 50 N; wherein at least one of the layer of flexible foam and the layer of polyurethane foam has a profiled surface at least partially defining a plurality of air flow paths between the layer of flexible foam and the layer of polyurethane foam.