Oracle - the solution for those with chronic nasal problems Clinically proven to function as effectively as a nasal mask, the Oracle 452 is a perfect solution for mouth breathers and patients with chronic nasal obstruction. The Oracle 452 Oral Mask is easy to use and easy to seal. With nothing covering the field of vision, the Oracle provides freedom of movement rivalled only by the Opus 482 direct nasal mask. You have the freedom to choose the Flexitube position with 360 degrees of movement. With its single strap headgear, the Oracle mouth mask offers minimal intrusion. The minimal, lightweight and comfortable single Breathe-o-Prene strap allows clear vision and movement. The oral mask\'s rotating adjustment dial provides easy and specific adjustment of the distance between the SnapFlap Cover and SoftSeal Mouthpiece for a personalized fit. It is very simple to use to use - just rotate the adjustment dial. This can even be adjusted once the mask is already fitted. The material filter in the diffuser helps make the make quieter during use. The advanced air diffuser system also prevents air from blowing onto the sleeping partner and decreases noise that could potentially disrupt sleep. The SoftSeal Mouthpiece combines with the SnapFlap Cover to provide a leak-free combination. It works by holding the lips snugly between the inner SoftSeal Mouthpiece and the outer SnapFlap. One part sits between your teeth and lips in the mouth, keeping the mask in place while the other sits on the outside around the lips, helping keep an excellent seal throughout the night. These technologies work together to provide a simple, superior seal and maximum comfort. The Oracle oral mask\'s easy-release strap allows for one-step removal for when you need to get up and out of bed. Simply pull the easy-release cord for one-step removal of the mask\'s headgear. No additional headgear adjustments are required as it all hooks back into place exactly as it was. Please Note: The Oracle 452 oral mask is recommended only in combination with a heated humidifier. It\'s normally the little hairs in the nose which prepare the air for entry into your airways. When using the Oracle, air from your CPAP or APAP will not be warmed up leading to an uncomfortable and dry experience. Please only order the Fisher & Paykel Oracle 452 oral mask when your PAP machine has a heated humidifier, or simply add an appropriate humidifier to you order at the same time.