The Fisher & Paykel Nasal Solo CPAP Mask Cushion Replacement is intended to replace your worn out cushion, giving you the same secure seal as when you first purchased your mask. A fresh cushion replacement is important for successful CPAP therapy and the Fisher & Paykel Nasal Solo CPAP Mask Cushion Replacement is recommended to be replaced every 1-3 months, depending on wear. Whether you're replacing a worn-out cushion or need an extra one, a cushion replacement lets you rest easy knowing your sleep therapy remains effective and comfortable.