The Tru-Flow Venturi is an accurate yet comfortable mask for use with both adults and children. The Tru-Flow Venturi Mask is specially designed to aid patient comfort and the Safety Reservoir Tube ensures that the Oxygen flow remains at the required amount for the patient. The Safety Reservoir Tube also acts as a diffuser; this ensures a gentle air flow which results in increased patient comfort. The Mask is designed to fit all nose bridges and can be easily adjusted by the patient or carer.