The repetition of geometric elements forms a graphic pattern that defines the appearance and functional character of the Koi-Booki chair. The monocoque in injection molded polypropylene is combined with the frame in die-cast aluminum and with legs in extruded aluminum. Koi-Booki is stackable and can be equipped with a connection hook to compose rows of seats. A thermoformed fabric cushion is available as an accessory. Also available in fireproof version.