A seat trim cover for a vehicle seat comprises a molded foam backing formed on a cover material blank that has been vacuum-formed into a 3-dimensional shape. The cover material blank has been pre-cut into a predefined shape having a predefined selvage extending around an outer periphery of the cover material blank. The molded foam backing is spaced apart from the predefined selvage of the cover material blank forming a foam-free selvage. The molded foam backing includes a stepped edge profile having a first surface defining a first sewing alignment feature and a second surface defining a second alignment feature. The first sewing alignment feature is spaced apart from the second sewing alignment feature.