The shell is made by a self-supporting inner frame, padded with coloured jntegral foam. The material ( low density integral polyurethane foam) is the same used in the car industry where it’s utilized for the steering wheels production, thanks to its qualities of softness, flexibility, perspiration and scratch resistant. It is available in 10 colours for the shell. The four-leg base is available in steel or in solid wood (oak or American walnut).