Sofa upholstered in leather or fabric, enclosed within an outer shell made of curved and veneered multilayer wood, also available in glossy-finish burl veneer, trimmed along the perimeter with a continuous metal profile. The base, featuring crossed elastic webbing, supports a removable seat cushion made of differentiated-density polyurethane and down. The back cushions are also removable, filled with a mix of down and elastic polyurethane.