Automotive vehicle seat cushion

The cushion (1) has a mounting unit (2) connected to a structure of a motor vehicle in a rotatable manner around an articulation edge (3) between a utilization position and a folded position. The mounting unit has a flexible cover (4) projecting from the edge for forming a flexible hinge, where the flexible cover is made of fibrous material. A free end of the flexible cover is provided with an association unit (5) integrated to the structure of the vehicle. The flexible cover is associated to a covering material (9).