Two similar triangle profiles of the seat and the backrest are rotated at 90°, resulting in biggest thickness at the back of the seat and top of the backrest, the areas of highest pressure during seating. Flat profiles of the base are split into half, providing the support for both the seat and the backrest. The juncture at the crossing point stabilizes the structure. The seat and the backrest are made of upholstered, foam covered plywood plates. The base is made of lacquered bent.