(Pack of 3)
【Five-layer Filtration】 Multiple protection to isolate dust, multi-layer folding, good ventilation, double your protection with an additional filter.
【Great Material】 Activated carbon cloth + 2 layers PP anti-sticking cloth + 2 layers meltblown cloth. Activated carbon adsorption, five layers of filtration for physical isolation.
【Flexible size】 12cm* 8cm（4.72*3.15 inch), suitable for multiple types. Suit for anti smoke, dust, pollution, ash, gardening pollen and most occasions.