Toyota Prius Owners Manual
Use a floor mat of the correct size.
If the vehicle carpet and floor mat have2 holes, then they are designed for usewith locking clips. Attach the floor mat tothe vehicle carpet using the clips. Lockthe clips into the holes in the vehiclecarpet.
Make sure the floor mat is properlyplaced on the vehicle carpet. If thefloor mat slips and interferes with themovement of the pedals during driving,it may cause an accident.