The structure of Grandma sofa is composed of plywood/solid oak or American walnut. The armrests are made of the same materials: solid oak or American walnut. Non-deformable polyurethane foam covered with polyester fiber wadding composes the padding. The upholstery is in removable fabric, washable according to the instructions on the label. The feets are in anti-slip and non-scratch high-density wool.