F5A Full Face CPAP Mask Price in Bangladesh. The F5A face mask has a forehead frame-free design, and a quick click frame attachment for easy reassembly after cleaning. It includes flex grove auto-fit cushions for maximum comfort. 360 la ball and socket elbow rotation ensure freedom of movement of single-layered soft cushions. Easy release clip for quick attachment and removal. Its 3-part assembly and 4 convenient velcro adjustment points give patients better service.