The invention relates to a closure system (5) for an article, with a zip fastener (1), a slider (2) and a zip fastener grip (3), in which the zip fastener grip (3) is at least partially passed through a locking piece (6) designed or arranged on the article when the zip fastener (1) is in the closed position. In this closed position, the slider (2) is held in position on the article. Furthermore, at least one plate (4) is arranged in the region of the locking piece (6), at least when the zip fastener (1) is in the closed position.