Abstract: A nasal device comprises a first component and a second component and a connector for coupling the first component to the second component and configured to span a nasal septum of the user. The first component comprises a body for insertion into a nasal cavity of a nose of a user. The body comprises a loop structure having an inner surface defining an aperture and a reverse outer surface, the loop structure being configured for alignment with an interior contour of a nasal passage of the nose, a platform spanning the aperture defined by the inner surface of the loop structure, and a valve mechanism disposed on the platform for controlling fluid flow through the aperture. The first component further comprises at least one mount extending from the body.