Top layer of 4" NuRest® Better Than LatexTM for long lasting life * Bottom layer of 4" high density foam to provide long lasting durability and stability * Night Therapy Real MATTRESS® in a box embraces the idea of Sleep Green" so that the comfort of your sleep environment is balanced with ingredients that are safer for you and the environment we all share * The ingredients used in this product were selected with sustainability in mind * Poly jacquard cover for ultimate softness.