The ResMed AirMini Filter Cover in Dove Gray is a crucial replacement part for the AirMini CPAP machine. This cover safeguards the filter, ensuring clean air delivery during therapy. To purchase, visit specialized CPAP equipment retailers like CPAP.com or Amazon, ensuring you select the correct color and model for your AirMini machine. Follow the manufacturer's instructions for proper installation. Regular replacement of the filter cover maintains the effectiveness of your CPAP therapy. For precise usage guidance, consult the user manual or contact the manufacturer.