“SUM” by Francesco Rota for Desalto: the sum of essential forms and the interplay of materials and finishes, for a complete compositional freedom The “Sum” upholstered system, designed by Francesco Rota for Desalto, interprets the idea of essential comfort through a restrained, contemporary language, while introducing an entirely original aesthetic thanks to the distinctive interaction between the metal structure and the fabrics, fully customisable in colour. Clean lines, balanced proportions and meticulous attention to detail define a versatile collection, designed to adapt naturally to a variety of settings. Freely combinable modules allow for tailored solutions in any environment. The padding, in differentiated-density polyurethane foam, provides ergonomic support and a high level of comfort.