Filters are not washable, it is recommended to use 1 filter for 3-7 days. If you are in a severely air polluted environment, it is recommended to replace it every 3 days.
If the filter is contaminated with foreign objects, oil stains, etc., replace it in time.
If you have breathing problems, it is not appropriate to wear a mask.
Masks are not recommended when air is scarce or when you are sleeping.
This product is not suitable for children under 8 years old.
