Mattress system

A mattress system comprising:

• a first section of foam material forming the head section of a mattress;
• a second section of foam material forming the central section of the mattress;
• a third section of foam material forming the foot section of the mattress;
• said second section of foam material having a load responsive characteristic different from the load responsive characteristic of the first and third sections;
• fourth, fifth and sixth sections of foam material disposed adjacent to the first, second and third sections, at least one of said fourth, fifth, and sixth sections having a load responsive characteristic different from the load responsive characteristic of at least one of the first, second, and third sections;
• seventh, eighth, ninth, tenth, eleventh, and twelfth sections of foam material disposed below the first six sections;
• wherein all the foam sections are the same size and readily separable, movable, and interchangeable by a user from one location in the mattress to another;
• and
• a cover in which the foam sections are disposed, said cover being non-destructively and repeatably openable and removable from the foam sections to allow for removal and arrangement of the foam sections.