Urban Max Filter x 3
High filtration filters for urban use. Protects you against particulate matter (pollution) viruses, bacteria and allergens.
This filter filter 99.9% of particulate matter (PM 2.5).
The four layer construction protects you efficiently against most airborne hazards and should be change depending on the level of exposition to particulate matter.
For a typical anti-pollution protection use we recommend changing it every 7 days of use.