A mat system for a vehicle floor that has a floor mat retainer defining a fixed first vertical axis. The floor mat system includes an adapter portion and a mat portion. The adapter portion has a first receiver to enable engagement of the adapter portion to the mat and a plurality of second receivers to enable engagement of the adapter portion to the mat retainer at a selected one of a multitude of locations. Each engagement of the adapter portion to the mat retainer is rotational about the fixed first vertical axis, according to a selection from the plurality of second receivers.