The ResMed AirFit N30 Headgear, designed for the N30 Nasal Mask, features an easy-to-wear QuickFit elastic design and minor adjustment clip. It's light gray, specific to the N30, and not compatible with the P10 mask. Lightweight at 1.6 ounces and quiet at 18 decibels, it suits minimalists and side sleepers, reducing nasal bridge discomfort.