The present disclosure relates to an upholstery system for a vehicle seat, comprising: a foam lining comprising a front face and a rear face, a flexible covering which covers the front face of the foam lining, a rigid part which covers the rear face of the foam lining, at least one series of attachment systems, which are received as inserts in the foam lining, the attachment systems of the series being interconnected by at least one ball joint, and wherein the attachment systems are configured to ensure the attachment of the covering and of the rigid part onto the foam lining.