Abstract: A breathing gas air delivery device (10) for attachment to the calumella of the wearer's nose septum having a frame (12) which includes a U-shaped clip (14) with legs (16) and nasal septal engaging projections (18) which clip (14) in turn is connected to an outwardly spaced side frame piece (24,26) on each side of clip (14) and supported at least in part by a cross frame support piece (28,30) so that finger pressure on the side frame pieces (24,26) spreads the clip legs (16) and projections (18) for attachment and removal of the device. A pair of air intake tubes (32,34) are supported in the frame and are connected to filter holder menas (20,22). The filter holder means (20,22) may be attached to and supported on the frame or connected by tubular means (142, 146,148) to the air intake tubes. Sealant pads (36,38) block off the nasal openings except for air entering the nasal passages through said air intake tubes (32,34).