1The forehead regulator can be adjusted in multiple gears to ensure tightness and comfort. 2Multi-directional rotating elbow, multiple air vents to disperse airflow and reduce noise. 3Headband is easy to disassemble, simple operation, convenient to fix. 4Silicone material, soft texture, easy to clean and use. 5An important accessory for respirator, can help a lot for health care.
