A system for providing respiratory support to a patient comprising: a first respiratory support system comprising a first patient interface for providing a first flow of gases to the patient, the first patient interface being independently locatable upon the patient, wherein the system comprises a device, such that with the first patient interface located upon the patient, the device is configured to facilitate a switching of the system between different respiratory modes: - in a first respiratory mode, the device allowing delivery of the first flow of gases to an outlet of the first patient interface when a second patient interface is absent or removed from the patient and/or when a second flow of gases is stopped from being delivered to the patient by the second patient interface, - in a second respiratory mode, the device reducing or stopping delivery of the first flow of gases to the outlet of the first patient interface when the second patient interface is located together with the first patient interface upon the patient and/or when the second flow of gases is delivered to the patient by the second patient interface, wherein the first respiratory support system comprises a first gas conduit and the device, the device comprising a collapsible portion of the first gas conduit configured to transition between a first configuration for providing a first level of the first flow of gases to the outlet and a second configuration for providing a second level of the first flow of gases to the outlet, the second level less than the first level, and one or both of: - wherein the system switches from the first respiratory mode to the second respiratory mode by transitioning the collapsible portion from the first configuration to the second configuration, - wherein the system switches from the second respiratory mode to the first respiratory mode by transitioning the collapsible portion from the second configuration to the first configuration. a first respiratory support system comprising a first patient interface for providing a first flow of gases to the patient, the first patient interface being independently locatable upon the patient, wherein the system comprises a device, such that with the first patient interface located upon the patient, the device is configured to facilitate a switching of the system between different respiratory modes: - in a first respiratory mode, the device allowing delivery of the first flow of gases to an outlet of the first patient interface when a second patient interface is absent or removed from the patient and/or when a second flow of gases is stopped from being delivered to the patient by the second patient interface, - in a second respiratory mode, the device reducing or stopping delivery of the first flow of gases to the outlet of the first patient interface when the second patient interface is located together with the first patient interface upon the patient and/or when the second flow of gases is delivered to the patient by the second patient interface, - in a first respiratory mode, the device allowing delivery of the first flow of gases to an outlet of the first patient interface when a second patient interface is absent or removed from the patient and/or when a second flow of gases is stopped from being delivered to the patient by the second patient interface, - in a second respiratory mode, the device reducing or stopping delivery of the first flow of gases to the outlet of the first patient interface when the second patient interface is located together with the first patient interface upon the patient and/or when the second flow of gases is delivered to the patient by the second patient interface, wherein the first respiratory support system comprises a first gas conduit and the device, the device comprising a collapsible portion of the first gas conduit configured to transition between a first configuration for providing a first level of the first flow of gases to the outlet and a second configuration for providing a second level of the first flow of gases to the outlet, the second level less than the first level, and one or both of: - wherein the system switches from the first respiratory mode to the second respiratory mode by transitioning the collapsible portion from the first configuration to the second configuration, - wherein the system switches from the second respiratory mode to the first respiratory mode by transitioning the collapsible portion from the second configuration to the first configuration. - wherein the system switches from the first respiratory mode to the second respiratory mode by transitioning the collapsible portion from the first configuration to the second configuration, - wherein the system switches from the second respiratory mode to the first respiratory mode by transitioning the collapsible portion from the second configuration to the first configuration.