Light Weight & Breathable 
Anti-fog, Anti-formaldehyde
Cozy Breathing with Ergonomic 3D Design
Perfect Filtering by 4-Layered Structure
Recommended for 4-12 Years old
Filter effect:> 95%
Material: Non-woven
Size：175mm*75mm
Thickness: 4 layers
Standard Number: GB2626-2006
Contains 10 pcs per pack