Patent ID: 8800082

Claim:
A mattress assembly comprising: a base having a periphery; a generally rectangular encasement extending upwardly from said base along the periphery of said base to define an interior cavity, the encasement having an exterior sidewall; a border assembly affixed to the exterior sidewall of the encasement; a spring unit secured within said interior cavity; wherein said encasement comprises alternating layers of closely woven cloth and foam comprising: a. an outer layer of closely woven cloth; b. a first layer of foam; c. an intermediate layer of closely woven cloth; d. a second layer of foam; and e. an inner layer of closely woven cloth; wherein at least one of the closely woven cloth layers is affixed to at least one of the first and second foam layers and the base; and multiple spaced lines of stitching extending through the border assembly and all the alternating layers of closely woven cloth and foam, to firmly secure the border assembly and said alternating layers together to form a firm, flexible composite encasement; wherein the closely woven cloth layers retain the multiple spaced lines of stitching in place within the foam layers when subjected to the weight and movement of a sleeper on the mattress.