The comfort is achieved through the use of an innovative manufacturing process of the shell. The material is called FREEFORM ADVANCED, an integral solid-coloured foam, whose molecular structure is very stable and partly self supporting, that means more flexibility and more comfort as well as lightness to the chair. The shell is available in 12 fresh colours. 4-Leg base comes in polishesd or matt chrome, powder coat, or in oak or walnut. Swivel cross base is white, black or chromed steel. Spider swivel base in die-cast aluminum in powder coat. Self return. Custom foam colours available for orders of 50 units or more.