These Dual-Wall Nasal Pillows are used on all AirFit P10 and AirFit P10 For Her CPAP/BiLevel masks. AirFit P10 Nasal Pillows feature a soft outer wall for comfort and a secure inner wall for support. They rest on an integrated air chamber, with trampoline action, that adapts to your natural movements during sleep providing a gentle, secure seal even for the most active sleepers.