BMC F1B Full Face MaskF1B a double-cushion facial mask, can provide you with excellent Respiratory Care. Humanized design makes the therapy as comfortable as possible.Features: Double cushion, more stability F1B keeps BMC`s classic double-cushion design with more comfort and stability.Accurate forehead adjustment A wide adjustment range and accurate locations ensure the mask can fit most of the facial contours.Upgraded headgear clips Easy lock, quick release.Multifunctional ports A bilateral port makes the oxygen input or pressure titration as convenient as possible.