BMC F4 Full Face Mask F4 demonstrates our commitment to patients who are seeking for user-friendly NIV interface solution. FeaturesAutoFit cushionThe shaped groove on the cushion provides an inclusive range adapting to most of the face contours.Slim forehead braceA balance between the reinforced stability and the widened vision is achieved by the slim brace inspired by the minimalist concept.Multifunctional portTwo embedded ports on the bilateral sides of the main frame make the oxygen input or pressure test as convenient as possible.Ball & socket elbowThe universal elbow allows the user to turn over freely as needed.Modular designThree cushion sizes are compatible with the same frame. All size kit is available for your choice.