Replacement five-layer PM2.5 filter - pack of 2

2 pcs packed in a small polybag, 2x5pcs gives 10pcs/pack in total.

Compatible with most, easy to insert or replace the original one

5 layers, soft and breathable, ideal to protect your mouth and face from Dust, Haze, Pollen, airbone particles.

Replace the filter frequently - should not be used for more than one week.