Optimise comfort and seal performance with the ResMed AirFit F40 Cushion. This under-the-nose cushion provides effective airflow while reducing pressure on the nasal bridge—ideal for patients who find traditional full face masks bulky or uncomfortable.
 
Sizing is critical for this design:
Medium / Large – determine overall height and facial coverage
Small Wide – offers a lower profile with a broader seal width for wider nasal and mouth coverage
 
An incorrect fit can lead to leaks, noise, or discomfort. Over time, cushions lose flexibility and seal quality—regular replacement (typically every 1–3 months) helps maintain comfort, minimise leaks, and ensure consistent CPAP therapy.