Abstract: An air freshener includes a first arm and a second arm connected together at one of their ends by a joint to enable swinging of the arms between an open configuration and a closed configuration. In a closed configuration, a fastener clasps opposite ends of the first arm and the second arm together to surround a central space in which a support structure, such as a support post of a rearview mirror on a vehicle, may be positioned. The first arm and the second arm each include an inner wall and lateral side walls defining an open chamber in which a fragrance substrate is retained by an interference fit. The inner wall defines an interior periphery, and ends of the lateral side walls define an exterior periphery of the air freshener.