No-flip mattress and methods for their construction

A method for constructing a mattress, the method comprising:

• providing a core of springs that are encased in fabric pockets;
• placing a top padding layer on top of the core of springs;
• bonding a bottom support layer to the fabric pockets to couple the bottom support layer to the core of springs and to restrict movement of the springs relative to each other near the bottom support layer to stabilize the mattress, wherein the bottom support layer has firmness that is at least about 40 IFD.
• wherein the bonding step comprising applying adhesive to the bottom support layer and placing the bottom support layer against the fabric pockets, and wherein no adhesive is applied between the top padding layer and the core of springs.

A mattress comprising;

• a core of springs having a fabric covering, wherein the springs each have a top end and a bottom end;
• a top padding layer positioned on top of the core of springs;
• and
• a bottom support layer beneath the core of springs, wherein the bottom support layer is bonded to the fabric covering of the core to couple to bottom support layer to the core of springs, wherein the top padding layer is unbonded to the core of springs to permit individual movement of the top ends of the springs relative to each other, and wherein the bottom support layer comprises a matrix of foam elements having a density of about 3 pounds per cubic foot or greater, and wherein the bottom layer has a firmness of at least about 40 IFD.