A nasal CPAP cannula seal that includes a strip of flexible material, between about 3 to 10 cm in width and between about 5 to 15 cm in length. The strip defines a pair of substantially round nostril apertures, each aperture having a diameter of between 2 mm and 4.5 mm and being spaced apart by from 1.5 mm to 3 mm. Also, the strip further defines a set of cuts extending outwardly from each nostril aperture.