The Mac-Safe CO2 monitoring nasal cannula is specially designed to provide supplemental oxygen while simultaneously sampling end-tidal carbon dioxide. The cannula provides oxygen through two bottom ports, while nasal prongs collect expired gases that can be tested through the sampling line. The cannula nose piece is made with a special manufacturing process which results in a flexible soft finish for increased patient comfort. Cannula comes with Fits-All Oxygen Connector which is designed to fit flow meters without the need for adapters.