Resmed AirFit N30i Nasal Cradle Mask Replacement Frame SystemReplacement frame system for ResMed's AirFit N30i Nasal Cradle Mask. Does not include headgear. Features Specs Top of head connection: Keeps air tubing out of your way for more freedom Slip on design: Simple to put on and take off Quick release elbow: Allows you to get up at night and disconnect without removing the mask Nasal cradle cushion: Sits comfortably under the nose rather than over it Sizes: Small, Standard Cushion Material: Adaptive Silicone