Description Product Features The unique design of the Hybrid promotes comfort by eliminating pressure points on the forehead and across the bridge of the nose. A built-in chin flap gently supports the chin for stabilization and fit. The Hybrid complete system contains all sizes of all components. Features Universal Design- the unique design of the Hybrid combines the best features of both a nasal pillow system and a traditional full face mask. It offers all sizes and multiple combinations for easy flexible fitting and is designed for quietness and comfort. Built-In Chin Flap-ideal for mouth breathers, No chin-strap required No Nasal Bridge or Forehead Contact-glasses may be easily worn, and nasal bridge sores and air leaks are eliminated. Hybrid Complete System Contains All Sizes of Pillows and Cushions-numerous combinations of sizes are possible for a personal fit. Premium Headgear Five points of adjustability provides a better seal and increased support, and strap buckles make it easy to remove and reapply the mask