The ResMed AirFit N30 Cushion for the N30 nasal cradle mask comes in small (red), small wide (purple), and medium (blue). It offers a comfortable under-nose fit, is latex-free to minimize leaks, and is compatible only with the N30 mask. Designed for comfort and a secure seal, it's interchangeable with the AirFit P10/N30 headgear for easy maintenance.