• 4/5 layers of protection: non-woven outer layer + filter paper layer + skin friendly non-woven inner layer. Breathable and comfortable, low breathing resistance.
• The plastic strip of bridge of nose hides the side of bridge of nose. More suitable for all face types.
• High elastic flat ear straps: will not strain the ears.
• Inner layer: skin friendly non-woven fabric; soft and comfortable to reduce the possibility of skin allergies.
• Physical ultrasonic welding, densification of welding points, strong and durable, fine workmanship.
• Unique shape patented product

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