The structure of the Antohn sofa is in solid beech with central iron crossbar for the seat, in solid beech and poplar with birch plywood and poplar panels for the backrest and armrests. The backrest is padded with polyurethane foam and the front quilt with goose down and polyester wadding. The seat is padded with polyurethane foam and polyester wadding. The spring system consists of elastic belts.