The backrest shell is formed from moulded polyurethane foam with light padding in polyurethane foam and polyester wadding. The seasoned beechwood seat is padded with polyurethane foam and pressed felt and has a spring system consisting of elastic belts. The seat cushions are in goose down with polyurethane foam stabilising insert to reduce the sinking effect without compromising on comfort. The four feet are made from solid ash in a wenge stain or moka ash. The external shell of the Nivola sofa and armchair is upholstered in saddle-leather or Pelle Frau® leather while the inside is covered in Pelle Frau® leather or fabric, enriched with fine visible contrast stitching.