In plywood. The structure (seat and backrest) is coated in high-resilience, variable-density polyurethane foam, encased in breathable heat-bonded polyester fiber quilting laminated to hypoallergenic white cotton fabric. The backrests are attached to the padded base through a system of quick set and release closures. The Paolina armchair backrest is attached to the structure with pins and levers. Upholstery is completely removable in all version’s fabric