Abstract: A gas delivery tube includes a flexible tube having a tube wall, a first end for connecting to a supply of gas, and a second end having an orifice insert portion for insertion into the orifice of a patient, and forming means contained within the tube wall for selectively forming the tube to the face and into the orifice of a patient, the forming means extending into the orifice insert portion, whereby the tube may be formed to the face of a patient and into the orifice of the patient in a variety of configurations.