This Dual-Wall Spring Air Cushion is designed for use with all Mirage FX & Mirage FX For Her CPAP Masks. Gentle Spring Air™ cushion creates a perfect seal while delivering whisper-quiet therapy and provides even pressure distribution with extra softness at the nasal bridge, reducing common discomfort in this sensitive area ©ResMed 2010 Used with Permission to all WebPages with ResMed pictures RESMED Minimum Internet Retail Price & POLICIES FOR THIS PRODUCT - We are only authorized to sell and ship Resmed products to end-users residing in the United States. A prescription is required for the purchase of certain products on this site including masks, humidifiers, and machines. All services are provided solely by The CPAP Shop and independently of the manufacturer. These services include the advertisement, ordering, sale, delivery, instruction, and setup of the products.