Abstract: Light weight seating furniture (5) construction with a very high memory effect. The seating furniture is light weight and when constructed as a sphere completely shape-retaining after the removal of the seating load and thereof easy to transport, e.g. by rolling over the floor. The light weight seating furniture (5, 9) construction comprises a shell construction which is deformable under seating load and which is filled up with an number of relatively small shape-retaining particles for support and advancement of the temporary shape-retaining property of this shell construction when a person is positioned thereupan. The shell construction consists of geometrically shaped air permeable shell shaping sheet elements (7, 8) manufactured from porous natural or plastic material with spring back property, as a resuit of which the shell construction obtains the property of a flexible skeleton structure with memory effect.