I remixed the Model using an other shape for the hanger: instead of a triangle its more like a belt. This ensures better fitting at e.g. a wardrobe rod. Besides this I also changed the connector between the attachement holder itselt (in my print the white item) and the hanger so it has a much better grip and cannot slide off.

For best results use a medium or hard flex TPU (95a, 98a, 56d) for the belt and just regular PLA for the holder-item.