Two-layer foam mattress with complementary body contours

Abstract

A mattress with two layers. The upper layer includes a flat top surface, and the lower layer has a flat bottom surface. A contoured surface defines the lower boundary of the upper layer and the upper boundary of the lower layer. The contour generally matches the curvature of an individual's body when recumbent. More specifically, the bottom surface of the upper layer is shaped to match the curvature of individual's body, while the top surface of the lower layer is complementary to the curvature of the individual's body. When so arranged, the bottom surface of the top layer and top surface of the bottom layer are complementary to one another, and the top layer may be nested upon the bottom layer.

What is claimed is: 
     
         1 . A mattress, comprising:
 a top layer with an upper surface and lower surface; and   a bottom layer with an upper surface and lower surface;   wherein the upper surface of the bottom layer comprises at least one downward contour surface or indentation corresponding to approximate shoulder and/or hip locations of a recumbent user; and   wherein the lower surface of the top layer is complementary to the upper surface of the bottom layer.   
     
     
         2 . The mattress of  claim 1 , wherein the upper surface of the bottom layer comprises a smoothly curved contour. 
     
     
         3 . The mattress of  claim 1 , wherein the contour surface or indentation matches the specific body profile of a user. 
     
     
         4 . The mattress of  claim 1 , wherein the upper surface of the bottom layer comprises at least one upward contour surface or indentation corresponding to approximate head and/or foot locations of the recumbent user. 
     
     
         5 . The mattress of  claim 1 , wherein the thickness of the top layer is different than the thickness of the bottom layer. 
     
     
         6 . The mattress of  claim 1 , wherein the density of the top layer is different than the thickness of the bottom layer. 
     
     
         7 . The mattress of  claim 1 , wherein the firmness of the top layer is different than the thickness of the bottom layer. 
     
     
         8 . The mattress of  claim 1 , wherein the firmness of the top layer is different than the thickness of the bottom layer. 
     
     
         9 . The mattress of  claim 1 , wherein the firmness or density of the bottom layer is greater than the corresponding firmness or density of the bottom layer.