The Spring Air Full Face Cushions are designed for use with all AirFit F10 & AirFit F10 For Her, Quattro Air & Quattro Air For Her CPAP/BiLevel Masks. The enhanced Spring Air Full Face Cushion has a lightly textured surface that feels more natural on the skin and improves overall seal; while the dual-wall design gently inflates with therapy air during use to create a soft, adaptable cushion of air between the mask and the face.