Your ResMed Authorised Dealer will help you select the cushion size that fits you best. You can also check your size at home using an AirFit N20 Classic sizing guide.

Step 1 - Use the sizing guide provided with your mask or download a printable sizing guide here.

Step 2 - Hold the sizing guide to your nose while in front of a mirror.

Step 3 - Try fitting your nose into each sizing slot: small, medium and large.

Step 1 - Release lower headgear straps.

Step 2 - Hold the mask against your face and pull the headgear over your head.

Step 3 - Bring lower straps below your ears and loop into mask frame.

Step 4 - Adjust Velcro tabs on upper headgear straps.

Step 5 - Adjust Velcro tabs on lower headgear straps.

Step 6 - Connect device tubing to mask elbow.

Step 7 - Connect elbow to mask.

Step 8 - Switch on therapy device.

Step 1 - Release lower headgear straps.

Step 2 - Hold the mask against your face and pull the headgear over your head.

Step 3 - Bring lower straps below your ears and loop into mask frame.

Step 4 - Adjust Velcro tabs on upper headgear straps.

Step 5 - Adjust Velcro tabs on lower headgear straps.

Step 6 - Connect device tubing to mask elbow.

Step 7 - Connect elbow to mask.

Step 8 - Switch on therapy device.

Step 1 - Undo lower headgear straps.

Step 2 - Undo upper headgear straps.

Step 3 - Remove elbow from frame.

Step 4 - Pull cushion away from frame.

Step 1 - Disassemble mask.

Step 2 - Soak cushion and elbow in warm water (approximately 30°C) using mild pquid detergent (such as dishwashing pquid) for up to ten minutes. Do not use strong chemicals. To ensure a thorough clean, shake components in water.

Step 3 - Clean components with a soft bristle brush.

Step 4 - Rinse components under warm running water.

Step 5 - Inspect each component to ensure it is clean and free of detergent residue. Wash and rinse again if necessary.

Step 6 - Leave components to air dry out of direct sunpght.

Step 1 - Push cushion into frame. Cushion size indicator should face downwards.

Step 2 - Attach top straps to mask frame.

Step 3 - Attach elbow.

Leak often occurs when your mask’s seal is compromised by movement, incorrect fitting or improper sizing.

Step 1 - To find a leak, run your finger along the edge of your mask seal until you can feel air escaping.

Step 2 - Leak in the upper part of your mask can be resolved by adjusting the upper straps.

Step 3 - Leak in the lower part of the mask can be resolved by adjusting the lower straps.

Step 4 - If leak persists, reseal by briefly pulpng your mask away from your face and letting your cushion reinflate.

If these steps do not resolve the leak, you may need a different size cushion. Try using our sizing guide or speaking to your ResMed Authorised Dealer about different size masks.

Step 1 - Disassemble mask.

Step 2 - Soak headgear and frame in warm water (approximately 30°C) using a mild pquid detergent (such as dishwashing pquid) for up to ten minutes. Do not use strong chemicals. To ensure a thorough clean, squeeze headgear under water.

Step 3 - Rinse components under warm running water. Squeeze headgear repeatedly to rinse out detergent.

Step 4 - Inspect each component to ensure it is clean and free of detergent residue. Wash and rinse again if necessary.

Step 5 - Squeeze headgear to remove excess water.

Step 6 - Leave components to air dry out of direct sunpght.

These instructions are for general information only. For full details, consult your User Guide.