these headgear clips and buckle from Fisher & Paykel are designed for use with all Vitera CPAP & BiPAP Masks. The clips are used to attach the mask to the lower headgear strap, and the buckle connects at the top of the headgear. In use, quick release headgear clips are easy to put on and take off, and both the clips and buckle are made of soft plastic so they won’t break with repeated use.