Prices are dependent on the color, size/model of the sofa. Antonio Citterio Esosoft sofa Manufactured by Cassina in Itlay: a modular sofa that embodies the timeless elegance and style Citterio is known for and, at the same time, is an aspirational tribute to the art of the great masters and to the practice of visualizing furniture by detaching the structural part from its padded interior.