Rocking chair.‎ polyethylene monobloc sand white colored outside and red or black colored inside.‎ “MT”, the acronym defining this collection designed by Ron Arad, in English is pronounced “empty” that means “vacuum” and emptiness is really the key element of this project.‎ The volume, achieved through a rotational molding, in fact, is hollowed and presents provoctively its interior, finished in different colours.‎ This is possible thanks to a double step in the rotational molding.‎ First of all the polyethylene of the outer shell color is placed in the mold.‎ Once formed this layer, the second color is inserted and adhere to the first without merging the two polymers, even though this process takes place in blast furnaces.‎ Once extracted from the mold, a five-axis laser will cut off the lateral ends of the product, revealing the two-tone side of the MT.‎ From the typological point of view is also reported the presence of a rocking chair, a rarity in the contemporary world.‎