FITS F20 Cushion Replacement Part for the AirFit F20 Mask, Non OEM, Size Medium.The FITS F20 replacement cushion utilizes a unique nose bridge stabilizing system for maximum mask seal and patient comfort.- Guaranteed to fit the AirFit F20 mask in S,M, or L sizes.- Features an innovative silicone cushion tested to perform up to the highest therapy pressures.- The forgiving cushion has been tested to prevent blowouts, accommodate patient movement and provide a robust seal across even the highest pressures.