Body support assembly

A body support assembly having an air permeable top surface for supporting a human body and a spaced away bottom surface defining a cushion volume and defining side walls, wherein the air permeability of the top surface is higher than the air permeability of the bottom surface and higher than the air permeability of the side walls,

• wherein the air permeable top surface has multiple air outlets and
• wherein the cushion volume comprises,
• an upper cushion zone nearest to the top surface and a lower cushion zone and separated by a separation sheet provided with openings, wherein the upper cushion zone and the lower cushion zone comprise of a compressible material which is permeable for air in all directions and
• a flow path for air comprising an air inlet in the bottom surface, air displacement means, a heat exchanger, a flow path through the compressible material of the lower cushion zone, through the openings in the separation sheet and through the compressible material of the upper cushion zone and multiple air outlets as present in the top surface, wherein the top surface for supporting a human body and a spaced away bottom surface defining a cushion volume and further define the side walls, wherein the cushion volume comprises an upper cushion zone nearest to the top surface comprising of the compressible material and a lower cushion zone comprising Bonnell springs as present between the bottom surface and a separation sheet, wherein the bottom surface and the part of the side walls at the elevation of the lower cushion zone is comprised of a single sheet of an air tight layer and wherein the top surface and the part of the side walls is comprised of a textile cover layer, wherein the upper end of the air tight layer is folded inwards and attached to the upper end of the separation sheet and wherein the lower end of the textile cover layer extends to the bottom surface and is folded inwards thereby covering the side walls comprised of the air tight layer and covering part or all of the bottom surface comprised of the air tight layer.