The SleepWeaver Advance Nasal CPAP mask, just like other masks within the SleepWeaver range, works in a similar way to balloon. The SleepWeaver Advance’s cloth inflates, which creates a secure and comfortable seal, as the black inner lining is pushed onto the CPAP users nasal area. The SleepWeaver Advance, and other masks within the SleepWeaver range, are different to most CPAP masks available, which are made from solid materials. Although the SleepWeaver Advance Nasal CPAP mask, and other mask within the SleepWeaver range can take a few nights to become accustomed do – most users report that the SleepWeaver Advance Nasal CPAP mask, and other masks within the SleepWeaver range, are the most comfortable nasal CPAP mask they have ever used.