Abstract: A mattress configured to form a sleeping surface in a playard is provided, comprising: an air permeable cover; and a frame including a pair hinges; wherein the cover includes a plurality of extensions that extend over the frame and opposing extensions of the plurality of extensions are connected together by a fastener that permits adjustment of a relative position of the opposing extensions to adjust a tension applied to the cover; wherein the cover includes a pair of side segments that are configured to be fixedly secured to the frame; and wherein the pair of hinges permit movement of the mattress between an expanded state and a collapsed state.

Abstract: A mattress configured to form a sleeping surface in a playard is provided, comprising: an air permeable cover; and a frame including a pair hinges; wherein the cover includes a plurality of extensions that extend over the frame and opposing extensions of the plurality of extensions are connected together by a fastener that permits adjustment of a relative position of the opposing extensions to adjust a tension applied to the cover; wherein the cover includes a pair of side segments that are configured to be fixedly secured to the frame; and wherein the pair of hinges permit movement of the mattress between an expanded state and a collapsed state.

Abstract: A mattress configured to form a sleeping surface in a playard is provided, comprising: an air permeable cover; and a frame including a pair hinges; wherein the cover includes a plurality of extensions that extend over the frame and opposing extensions of the plurality of extensions are connected together by a fastener that permits adjustment of a relative position of the opposing extensions to adjust a tension applied to the cover; wherein the cover includes a pair of side segments that are configured to be fixedly secured to the frame; and wherein the pair of hinges permit movement of the mattress between an expanded state and a collapsed state.

Abstract: A mattress configured to form a sleeping surface in a playard is provided, comprising: an air permeable cover; and a frame including a pair hinges; wherein the cover includes a plurality of extensions that extend over the frame and opposing extensions of the plurality of extensions are connected together by a fastener that permits adjustment of a relative position of the opposing extensions to adjust a tension applied to the cover; wherein the cover includes a pair of side segments that are configured to be fixedly secured to the frame; and wherein the pair of hinges permit movement of the mattress between an expanded state and a collapsed state.

Abstract: A support surface assembly comprising four corner elements; at least four elongated rigid frame sections; a first air permeable layer suspended between the at least four elongated rigid frame sections; and a second air permeable layer suspended between the at least four elongated rigid frame sections; wherein the four corner elements include at least one lock element, the lock element having a first position that engages at least one elongated frame section and prevents relative movement between the four elongated rigid frame sections; the lock element having a second position that permits relative movement between the four elongated rigid frame sections.

Abstract: A support surface assembly comprising four corner elements; at least four elongated rigid frame sections; a first air permeable layer suspended between the at least four elongated rigid frame sections; and a second air permeable layer suspended between the at least four elongated rigid frame sections; wherein the four corner elements include at least one lock element, the lock element having a first position that engages at least one elongated frame section and prevents relative movement between the four elongated rigid frame sections; the lock element having a second position that permits relative movement between the four elongated rigid frame sections.