Follow the steps
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Step 1
Holding your mask base in the one hand, spread the headgear with your free hand just enough to fit comfortably over your head.
Step 2
Lightly hold the mask against your face and speard the headgear over your head with your free hand infix the headgear info the buckle fixed.
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Step 3
Gently adjust top crown strap to remove slack.
Step 4
Gently adjust Top horizontal straps to ensure the bridge of the seal remains stable on nose.
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Step 5
Connect CPAP Machine hose running at prescribed pressure to mask. Remove the hook directly when finished.