Westmed BiFlo™ Nasal Mask Adult, 7 ft. Kink-Resistant Tubing, Latex-FreeThe BiFlo nasal mask is a simple and comfortable device designed as an alternative for oxygen therapy patients who cannot or will not tolerate a cannula or for those patients who have recurring necrosis.The BiFlo™ delivers a gentle flow of oxygen.Unlike a nasal cannula, oxygen flow is not jetted into the nasal cavity.