>95% filter and protection

The frist layer--Double soft non-woven 50g, Absorbs dust, odors and harmful particles.
The second layer--PP cotton fillter pm2.5 dust
The third layer--Meltblown non-woven 25g, thicker than the others, that filters more than 98% of bacteria.
The forth layer--Skin-friendly non-woven 50g, not only filter particulates but also friendly to sensitive skin.

15.5 cm*10cm (FOR ADULTS)

10pcs/bag, 100bag/carton