delivery conttent: ten filters for reusable silicon protection mask according to KN95 category Easy-to-replace filter thanks plastic case. The blue side of the filter must be inserted outward (away from the face) Please note before replacing the filter: - clean the mask with at least 75% alcohol or boiled water with more than 60 degree Celsius The period of use of the filter depends on the applications and intensity of use. Following period of use is recommened by the manufacturer: In medical or health and care area: replace the filter within 2-3 days In all other applications: the filter can be used until 5 days PLEASE NOTE: This is just a recommendation! We recommend to replace the filter more frequent or early - if you are using this masks and filters frequently. Especially when working with infected or ill persons.
