1. Large-diameter cold flow valve, isolating contaminated exhaust gas, closes during inhalation and opens during exhalation, reducing breathing resistance
2. The powerful activated carbon filter layer isolates and filters out harmful substances, ensuring efficient filtration
3. A brand-new upgraded wearing experience. The inner side is made of soft and skin-friendly non-woven fabric, which is hypoallergenic and non-irritating
4. Precise hemming process: The hemming process around the edges enhances the mask’s airtightness
