Internal sponge nose pad design: fit the nose bridge, sponge touch, reduce the pressure on the bridge of the nose; soft lining: smooth contact with the face, improve comfort Electrostatic filter cotton: small breathing resistance, filtering effect is above 95%; sealed nose clip: easy to fix, improve the seal of the mask, thickened four corners design, easy to shape and durable Three-dimensional cup design: three-dimensional cup design, large internal space, easy mouth movement, comfortable wearin Head-mounted design: liberating both ears, not ears when wearing, suitable for long-term wearing, comfort and tightness are higher than ear-band style SHOP WITH CONFIDENCE: To provide you with the highest quality service, if you have any questions, please don't hesitate to contact us. We will provide after-sales service until you are satisfied.