Comfy. The patented dual-wall cushion is designed to fit as comfortably and unobtrusively as possible. Simple. With only four parts, this masks is easy to assemble and clean. Silent. The Quattro Air for Her uses a sophisticated circular diffused venting system that quietly directs air away from you and your bed partner. Flexible. The flex-wing forehead support feels light on the face while providing the right amount of stability for a reliable and effective seal.