The replacement Cushion for the Zzz-Mask SG Nasal CPAP Mask comes as a single cushion in your preferred size: small, medium, or large. All three sizes fit on the Zzz-Mask SG.
Where do I find the size?
To find the size of the nasal cushion, turn the mask to view the flat bottom of the nasal cushion. The user will find the words "S M A L L," "M E D I U M," or "L A R G E" written below the blue rim of the mask frame and above the silicone flap.