The ResMed AirFit F20 is a full-face CPAP mask built around a soft silicone cushion and a magnetic quick-release clip — both wear parts that need regular replacement to keep your therapy sealed and comfortable.

Cushion: most people replace the F20 cushion every 1–3 months. A cushion that's gone stiff, cloudy, or won't hold a seal is the most common cause of air leaks and mask noise.

Headgear and magnetic clips: the fabric headgear stretches with wash and wear over roughly 6 months. If your mask keeps sliding or the clips have lost their snap, it's time for a new set.

Frame: replaced less often — check for cracks or a loose cushion seal if your mask has been dropped or is a year or two old.

Not sure this is your mask? The F20 is ResMed's full-face model with the distinctive dual-wall cushion and magnetic clips — compare against your current mask before ordering. Every part here ships genuine, direct from ResMed's Australian supply chain.