Features： 1、ERGONOMIC SILICONE PAD: Adopt double layer silicone pad, dynamic fit, maintain reliable sealing, less accidental air leakage, and provide more space for activities. 2、VENT HOLE: Adjustable forehead support structure, adapt to different face shapes. Multi vent design, more effective dispersion of airflow, quieter treatment process. 3、FACE GUARD ACCESSORY: Humanized buckle design, easy to wear, simple operation. Comes with face guard, headgear and tee assembly, easy to install and use. 4、FITMENT: Fit for BMC F1B, important and essential accessory for breathing machine. Wonderful replacement for the old or broken one, practical for use. 5、MULTIPLE APPLICABLE PLACE: Light weight and in small size, easy to store and carry, can be easily put into your bag, for home, hospital and health center. Specification： Item Type: Breathing Machine Face Guard Material: Silicone Fitment: Fit for BMC F1B Package List： 1 x Face Guard Frame 1 x Headgear 1 x Tee Assembly