A rotational mattress has (a) a support surface and a rotating bladder
object or (b) the support surface, the rotating bladder and a cushion
material object. Depending on the embodiment used, the rotating bladder
object and/or cushion material object has at least one longitudinal
hinge; a longitudinal hinge extends from the object's head end toward the
object's foot end. In one embodiment, the longitudinal hinge can be a
shaped aperture and within the shaped aperture is a second cushion
material. The second cushion material is less rigid than the cushion
material.