Mattresses, cushions, and body-support mats or pads are disclosed. Polymer(s) at least partially define a length, width and depth, the depth extending from an upper surface proximate to where a user rests to a lower surface opposite the upper surface. Voids in the polymer traverse at least a portion of the width. The plurality of voids are located at the lower surface and/or the upper surface and are defined by polymer walls and wall(s) of polymer walls define each polymer foot of polymer feet. A first region of a plurality of lower surface regions includes at least one foot of the plurality of polymer feet that has a first size. A second region of the plurality of lower surface regions includes at least one other foot having a second size. The at least one other foot spans a greater distance along the length than the at least one foot.