The ResMed AirFit F20 Non-Magnetic Mask Kit is designed for a wide range of faces. It includes the non-magnetic frame system, which is perfect for those contraindicated for the original F20 mask. The adaptive silicone cushion ensures a secure and comfortable seal, regardless of your face shape or size. In an international study, the AirFit F20 fit 96.5% of all patients. Recent studies show that 86% of patients prefer the seal of AirFit F20 over the current market-leading full face mask, citing stability and ease of use.