Fisher & Paykel Evora Full Face CushionEnsuring the success of your sleep therapy is a top priority. That's why it's crucial to replace your Evora nasal cushion once you notice any wear and tear on your mask. By doing so, you'll ensure the effectiveness and health of your therapy. Here's a guideline to help you understand when it's time to replace your F&P Evora Full Face Mask Replacement Cushion: Frequency of Replacement: Our recommendation is to replace your F&P Evora Full Face Mask