Simulated zero "g" mattress and cover

Abstract

A mattress is provided having three layers of differing properties stacked on top of each other which together have the effect of letting the user sleep in a simulated Zero G position without the aid of an articulating base. Two layers are contoured within the mattress let specific areas of the user's body sink further into the mattress than others. A cover with removable inserts is also provided for the mattress.

1 . A mattress having a length greater than a width, the mattress comprising:
 a first layer formed from a breathable and spring-like material;   a second layer formed from a visco-elastic polyurethane (memory foam);   a third layer formed from a high density polyurethane foam (HD foam);
 wherein the mattress is divided into five zones along the length of the mattress; 
 wherein a thickness of the third layer in a first zone and a fifth zone is greater than a thickness of the second layer; 
 wherein a thickness of the second layer in a third zone is greater than a thickness of the third layer; and 
 wherein a thickness of the first layer is the same in each of the five zones. 
   
     
     
         2 . The mattress according to  claim 1 , wherein a density of the second layer is 3-8 lb/ft̂3 and a density of the third layer is 1-3 lb/ft̂3. 
     
     
         3 . The mattress according to  claim 1 , wherein a thickness of the second layer in a second zone increases in thickness from 1-4″ at a beginning of the second zone to 2-10″ at an end of the second zone. 
     
     
         4 . The mattress according to  claim 3 , wherein a thickness of the third layer in the second zone decreases in thickness from 3-16″ at the beginning of the second zone to 1-10″ at the end of the second zone. 
     
     
         5 . The mattress according to  claim 3 , wherein the thickness of the second layer in the second zone increases at a constant rate. 
     
     
         6 . The mattress according to  claim 1 , wherein the fifth zone is a mirror image of the first zone and a fourth zone is a mirror image of a second zone. 
     
     
         7 . The mattress according to  claim 1 , further comprising a cover for the mattress, wherein the cover comprises:
 a bottom portion fully surrounding a bottom of the mattress and an outer periphery of the mattress,   wherein, along the length of the mattress, a top of the bottom portion extends downward in a consistent convex arc from 3″ to 10″, and   wherein, along the width of the mattress, the top of the bottom portion is parallel to a top surface of the a mattress.   
     
     
         8 . The mattress according to  claim 7 , further comprising:
 an inner cover connected to the bottom portion along the top of the bottom portion,   wherein the top portion and the bottom portion fully surround the second layer and the third layer.   
     
     
         9 . The mattress according to  claim 8 , further comprising:
 a top cover, wherein the top cover is releasably connected to the top of the bottom portion, wherein the first layer is located between the inner cover and the top cover.   
     
     
         10 . The mattress according to  claim 8 , wherein the inner cover is formed from a waterproof material. 
     
     
         11 . The mattress according to  claim 8 , wherein a top surface of the inner cover comprises at least two zippers, with a first zipper along a top portion of the top surface and a second zipper along a bottom portion of the top surface, and
 wherein a rectangular insert containing at least a portion of first layer is attached to the top portion using the first zipper and the second zipper.   
     
     
         12 . The mattress according to  claim 11 , wherein the rectangular insert comprises:
 a fabric layer folded over an edge of the first layer, wherein the edges of the fabric layer are joined on three sides to fully surround first layer, and   a pair of zippers on opposing ends of the fabric layer for mating with the first zipper and the second zipper on the top surface of the inner cover.   
     
     
         13 . The mattress according to  claim 11 , further comprising:
 a third zipper aligned adjacent the first zipper;   a fourth zipper aligned adjacent the second zipper adjacent the first zipper; and   a second rectangular insert containing a remainder of the first layer not contained within the rectangular insert,   wherein the second rectangular insert is attached to the top portion using the third zipper and the fourth zipper.   
     
     
         14 . The mattress according to  claim 11 , wherein the first rectangular insert and the second rectangular insert substantially cover the top surface of the mattress.