The ResMed Mirage Quattro Cushion is a dual wall cushion with Spring Air technology to ensure an active seal with a comfortable fit for your CPAP therapy. The Quattro cushion replacement reduces facial pressure during sleep apnea therapy and features a streamlined design for minimal mask drag. To be eligible for a return, your item must be unused, and in the same condition that you received it. It must also be in the original, unopened packaging.