AirFit N20 Cushion Size:Large and features the ActiveAir venting

and features the ActiveAir venting technology used with the AirMini

so you can sleep on your side or wear glasses

with shorter coverage on the compressor and battery

a long nasal cannula lets you move around while staying connected to your oxygen source

AirFit N20 Cushion Size:Large and features the ActiveAir ventingReplacement cushion for the AirFit N20 nasal mask InfinitySeal adaptive silicone for a comfortable, leak resistant seal Available in Medium and Large The AirFit N20 cushion is the replacement cushion for the ResMed AirFit N20 nasal mask. It features ResMed's InfinitySeal adaptive silicone for a comfortable seal that flexes during therapy without leaking. The design fits most facial structures and reduces pressure on the nose bridge with a thinner,