Abstract: A mask adapted for delivering pressurised air to a user, the mask comprising: an endoskeleton of a first resilient material encapsulated to a lamina of a second resilient material forming a mask body with a cavity. The second resilient material is more flexible than the first resilient material. The lamina having a face contactable skirt portion extending away from the endoskeleton perimeter. The skirt portion comprises an outer layer and an inner layer for providing variable contoured thickness to outer lamina segments of the face contactable portion. The face contactable skirt portion having a flexible cavity edge defining a cavity opening for receiving a nasal region. The endoskeleton and lamina has an aperture adapted to connect to an air delivery tube; the thinner flexible cavity edge is adapted to wrap into the cavity, when wrapped, the contoured thicker lamina segments wraps and seals around the sides of the nose.

Abstract: The present invention provides a pre-mix device for use with a test unit. The device includes a vessel, an integrated reservoir of test fluid, and a discharge port. A sample may be received into the vessel and the test fluid may be discharged from the reservoir into the vessel, so that a mixture of the sample and the test fluid may be released from the discharge port to a test unit.