So Clean 2 Neutralizing Pre-Wash HC406 The purpose of the diffuser

The purpose of the diffuser is to lower the sound level of any Fisher & Paykel Zest Q Series Mask

The headgear can be adjusted at the upper and lower attachments to the mask frame

The is the replacement headgear for the ResMed AirFit N30 nasal mask

The full mask is sold separately

With premium gel technology

So Clean 2 Neutralizing Pre-Wash HC406 The purpose of the diffuserThe Neutralizing Pre Wash is used for initial SoClean setup. It is important to use the Neutralizing Pre Wash to hand wash your PAP equipment before you connect your SoClean for the first time. The Pre Wash is a fragrance free, dye free soap that neutralizes any odors and scents on your PAP equipment.